PYSEC-2026-4051 Home Assistant: mDNS Server-Side Request Forgery

Summary Home Assistant Green is vulnerable to a Server-Side Request Forgery SSRF via the mDNS/Zeroconf IPP integration. An unauthenticated attacker on the local network can send a crafted mDNS response to trick Home Assistant into making HTTP requests to arbitrary hosts, including internal servic...

PYSEC-2026-4096 MCP Atlassian: SSRF Protection Bypass

Environment - Project: sooperset/mcp-atlassian - Affected function: validateurlforssrf - Affected path: header-based Jira/Confluence URL authentication flow - Tested endpoint: POST /mcp - Tested version: 2.14.5 Description The SSRF protection in validateurlforssrf can be bypassed with a URL...

PYSEC-2026-4163 SCBE-AETHERMOORE Unauthenticated AetherBrowser Ops API Exposes Operator Email Digests

Summary The AetherBrowser API server scripts/aetherbrowser/apiserver.py exposes the POST /api/ops/check-email endpoint without any authentication. Any remote attacker can call this endpoint and trigger execution of the emailreader.py subprocess, which connects to configured ProtonMail or Gmail...

PYSEC-2026-4109 MySQL MCP Server: Missing Origin/Host Validation in SSE Transport Enables Unauthenticated SQL Execution (DNS Rebinding / Direct Exposure)

Summary In SSE/HTTP transport mode, mysqlmcpserver constructs SseServerTransport without passing securitysettings. As a result, the MCP Python SDK's DNS-rebinding protection Origin/Host header validation is disabled; the Starlette application has no CORS or TrustedHost middleware; and the service...

PYSEC-2026-4108 MPXJ: Potential Path Traversal Vulnerability in Primavera P3 PRX and SureTrak STX readers

Impact When reading a suitably crafted PRX or STX file, MPXJ can be made to write files to arbitrary locations in the file system. Patches This issue is addressed in MPXJ version 16.5.0. Workarounds Do not read PRX or STX files from untrusted sources...

PYSEC-2026-4127 Open WebUI: Admin demoted through SSO role sync keeps read and write access to all users' notes

Summary A user who is demoted from admin by an identity provider keeps admin-level read and write access to every user's notes, over any Socket.IO connection that was already open when the demotion happened. Open WebUI caches the user's role on the socket at connection time, and the two SSO...

PYSEC-2026-4113 Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

Summary When enablejsonp=True, oauthlib's RevocationEndpoint reflects the user-supplied callback parameter directly into JavaScript response bodies on both success and error paths without validating that it is a legal JSONP callback name. This allows arbitrary JavaScript response generation inste...

PYSEC-2026-4065 lightrag-hku: Stored Cross-Site Scripting (XSS) in the LightRAG WebUI chat/answer renderer via ingested content

Summary The LightRAG WebUI renders assistant/answer chat content as raw HTML — react-markdown is configured with rehypePlugins=rehypeRaw and skipHtml=false and no HTML sanitizer rehype-sanitize, element allow-list, or custom urlTransform. Because answer content is derived from user-ingested...

PYSEC-2026-4106 Mnemosyne has JWT signature verification bypass sync server that allows authentication bypass

Summary The Mnemosyne sync server's authentication check decoded JWT bearer tokens but never verified their HMAC-SHA256 signatures. Any well-formed token was accepted, allowing an unauthenticated attacker to impersonate any user and read or modify their sync data. Severity: Critical CVSS 3.1:...

PYSEC-2026-4126 Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value Summary Calendar events carry a free-form meta object that is stored exactly as submitted, with no validation of the values inside it. The scheduler reads the per-event alert offset out of that object ...

PYSEC-2026-4156 pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a partially malformed /FlateDecode stream, where the byte-by-byte decompression is used. Patches This has been fixed in pypdf==6.18.1. Workarounds If you cannot upgrade yet, consider applyin...

PYSEC-2026-4175 urllib3: HTTPS proxy TLS configuration may be ignored or overridden

Impact urllib3 supports configuring TLS independently for an HTTPS proxy and the target server. proxysslcontext, proxyasserthostname, and proxyassertfingerprint configure the TLS connection to the proxy. sslcontext and the other target-specific TLS parameters configure the connection to the targe...

PYSEC-2026-4063 lightrag-hku: Sensitive Information Exposure Through Raw Exception Messages in API Error Responses

Summary The LightRAG API server passes raw Python exception messages directly into HTTP error responses across 30+ error handlers in every router. When combined with the default unauthenticated configuration see companion report on CWE-306, any network-reachable client can trigger exceptions whos...

PYSEC-2026-4088 MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_safe_path()

Summary The uploadattachment method in confluence/attachments.py reads and uploads arbitrary local files to Confluence without calling validatesafepath. Both download methods downloadattachment at line 223, downloadcontentattachments at line 272 correctly call validatesafepath before writing file...

PYSEC-2026-4093 MCP Atlassian: Reflected XSS in OAuth Setup Callback Handler

Summary The OAuth 2.0 setup wizard's local callback HTTP server reflects the error query parameter directly into an HTML response without any sanitization or encoding. An attacker can craft a malicious callback URL containing JavaScript in the error parameter that executes in the victim's browser...

PYSEC-2026-4081 MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass

Summary ENABLEDTOOLS and TOOLSETS filters are enforced at tools/list time only. tools/call dispatches from the full unfiltered tool registry 73 tools. Any user with access to the server endpoint that knows a tool name can invoke it directly. Tool names are not secret since mcp-atlassian is open...

PYSEC-2026-4104 MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path

Summary The mcp-atlassian server exposes an MCP tool confluenceuploadattachment and the Jira attachment variant that accepts an arbitrary server-side file path and opens it for upload without any path validation. When the server is deployed in HTTP transport mode streamable-http or sse, a remote,...

PYSEC-2026-4171 Soup Sieve: Polynomial-time ReDoS (O(n²)) in the whitespace/comment trimming regex `RE_WS_END` (triggers on VALID selectors)

Summary Before tokenizing, selectoriter trims leading/trailing whitespace and comments by running two regexes over the whole raw selector with .search. The trailing one, REWSEND = re.compiler'WSC$', is anchored only at the end $, not the start. Because .search retries the pattern at every offset,...

PYSEC-2026-4123 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a shared terminal server could get script of their choosing to run in the Open WebUI origin itself. The in-app port preview rendered the content of a previewed port in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, a...

PYSEC-2026-4122 Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint

Summary Any member of a channel who can post to it could also replace the text of a message written by a different member. The channel branch of the chat completions endpoint checked that the caller may write to the channel, and that the targeted message belongs to that channel, but never checked...

PYSEC-2026-4068 LiteLLM: Admin Key Handler Has Improper Authorization

A vulnerability was determined in BerriAI litellm up to 1.63.1. The impacted element is an unknown function of the file litellm/proxy/managementendpoints/keymanagementendpoints.py of the component Admin Key Handler. This manipulation causes improper authorization. The attack can be initiated...

PYSEC-2026-4112 JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the system clipboard

Description JupyterLab 4.5.0 enabled copying and pasing cells through the system clipboard. The paste path parses clipboard text as cell JSON and inserts the cells without clearing metadata.trusted, so a payload can declare its own output as trusted. JupyterLab does not sanitize a trusted output...

PYSEC-2026-4155 pypdf: Possible large memory usage when parsing font data

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires parsing the /Widths entry of a TrueType or Type1 fonts with unusually large values, for example during text extraction. Patches This has been fixed in pypdf==6.18.1. Workarounds I...

PYSEC-2026-4092 MCP Atlassian: Arbitrary server-local file upload to Jira/Confluence attachments via unrestricted file_path parameters

Summary The Jira and Confluence attachment upload tools accept caller-controlled file path parameters and read those paths from the MCP server's local filesystem before uploading the file as an Atlassian attachment. In local stdio deployments, this can expose files readable by the user's MCP...

PYSEC-2026-4078 LMDeploy vulnerable to arbitrary code execution via eval() of untrusted quant_dtype in model config loading

Summary lmdeploy = latest contains a code injection vulnerability in lmdeploy/pytorch/config.py line 620 that allows an attacker to execute arbitrary Python code by publishing a malicious HuggingFace model with a crafted quantizationconfig.quantdtype value. When a user loads the model with...

PYSEC-2026-4041 djust has broken object-level access control (IDOR)

Impact djust's per-object authorization getobject + hasobjectpermission, ADR-017 was enforced on the WebSocket mount and event paths but not on three other render entry points: a the initial HTTP GET render, b SPA urlchange navigation, and c % liverender % embedded child views. An authenticated...

PYSEC-2026-4174 Hugging Face Transformers downloads custom generation code before trust consent

A vulnerability in Hugging Face Transformers versions 4.49.0, = 5.8.1 allows remote Python files to be written to local disk without user consent when using GenerativePreTrainedModel.loadcustomgenerate. The function fetches and caches a remote module file before performing the required...

PYSEC-2026-4076 BerriAI litellm: SSO Login Does Not Invalidate Previous UI Session Tokens

A vulnerability was identified in BerriAI litellm up to 1.82.2. This impacts the function getredirectresponsefromopenid of the file litellm/proxy/managementendpoints/uisso.py of the component SSO Authentication Flow. The manipulation leads to session expiration. The attack is possible to be carri...

PYSEC-2026-4136 Picklescan missing detection when calling pytorch function torch.jit.unsupported_tensor_ops.execWrapper

Summary Using torch.jit.unsupportedtensorops.execWrapper function, which is a pytorch library function to execute remote pickle file. Details The attack payload executes in the following steps: First, the attacker craft the payload by calling to torch.jit.unsupportedtensorops.execWrapper function...

PYSEC-2026-4184

vLLM through 0.29.0 fetches and fully materializes remote or inline media before enforcing its documented media controls the VLLMMAXAUDIOCLIPFILESIZEMB compressed-audio size cap, default 25 MB, and the per-modality --limit-mm-per-prompt item limits. Across four ingress paths — the shared...

PYSEC-2026-4059 JupyterLab: Cross-site scripting (XSS) in JupyterLab via crafted language package (jupyterlab.json)

Description A language pack ships a Plural-Forms header saying how the language counts, for example nplurals=2; plural=n != 1;. JupyterLab turns that string into a function with new Function, so the header gets executed. The check that meant to keep it safe was a regular expression. The regex was...

PYSEC-2026-4150 PyJWT BOM Bypass

Affected Package - Package: PyJWT pyjwt on PyPI - Repository: https://www.google.com/url?q=https://github.com/jpadilla/pyjwt&source=gmail&ust=1781794518474000&sa=E - Affected version: 2.13.0 - Vulnerability class: Algorithm confusion / patch bypass --- Root Cause PyJWT 2.13.0 introduced a guard i...

PYSEC-2026-4033 Decepticon: Role-boundary forgery via ChatML special-token literals in web crawl output composed into LLM context

Summary Decepticon wraps web crawl results — the output of agent reconnaissance against target services — into LLM messages without neutralizing ChatML special-token literals. Under the BYOK Bring Your Own Key deployment model, users configure their own LLM credentials to any OpenAI-compatible...

PYSEC-2026-4111 Nautobot: Authorization bypass in approval workflow REST API allows self-approval and unauthorized activation of scheduled jobs

Impact This is an authorization bypass that escalates into unauthorized server-side job execution. 1. Primary impact - self-approval: The approver checks approver-group membership, change permission on the object under review, one-response-per-user are enforced only in the approve/deny actions on...

PYSEC-2026-4054 Jupyter Server: 5xx request logging leaks token-bearing Referer header values

Summary When a request returns a 500, jupyterserver/log.py logs a small JSON block of request headers. The Referer header was copied into it as-is, so a token in the Referer URL ended up in the logs in plain text. Impact Anyone who can read the server logs can pick tokens out of these 500 entries...

PYSEC-2026-4044 djust has Cross-Site Request Forgery on the Server-Sent-Events transport: a cross-origin page can drive a victim-authenticated SSE session

Impact The SSE client→server POST endpoints are @csrfexempt and the SSE GET stream endpoint had no Origin check, so a cross-origin page could drive a victim-cookie-authenticated SSE session: force the victim's browser to GET the stream URL which creates and mounts a LiveView as the victim and POS...

PYSEC-2026-4164 sentence-transformers local model loading bypasses trust_remote_code and executes custom Python

sentence-transformers contains a security control bypass vulnerability that allows attackers to achieve arbitrary code execution by exploiting a logic flaw in the importmoduleclass helper within sentencetransformers/util/misc.py, where the guard condition includes an 'or...

PYSEC-2026-4118 Open WebUI: Any authenticated user can inject chats into another user's folder via chat completions

Summary The chat-completions endpoint reads a folder id out of the request body and saves the newly created chat into that folder without checking that the caller is allowed to write there. Any authenticated user who knows a folder's id can put a chat of their own into another user's folder,...

PYSEC-2026-4134 PickleScan has multiple stdlib modules with direct RCE not in blocklist

Summary picklescan v1.0.3 latest does not block at least 7 Python standard library modules that provide direct arbitrary command execution or code evaluation. A malicious pickle file importing these modules is reported as having 0 issues CLEAN scan. This enables remote code execution that bypasse...

PYSEC-2026-4135 Picklescan missing detection when calling built-in python library function timeit.timeit()

Summary Using timeit.timeit function, which is a built-in python library function to execute remote pickle file. Details Pickle’s deserialization process is known to allow execution of function via reduce method. While Picklescan is meant to detect such exploits, this attack evades detection by...

PYSEC-2026-4196

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.82.0 until 2.118.1, HTMLBackendOptionsrenderpage=True permits file URLs because HTMLDocumentBackend.getbrowserrequestblockreason does not enforce the...

PYSEC-2026-4194

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.45.0 until 2.131.0, METS-GBS format detection in docling/datamodel/document.py and the backend in docling/backend/metsgbsbackend.py call tarfile.TarFile.getmembers...

PYSEC-2026-4146 PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse

Summary PyJWT.decode/decodecomplete mutates a caller-supplied options dict in place whenever verifysignature is falsy, adding verifyexp/verifynbf/verifyiat/verifyaud/verifyiss/verifysub/verifyjti keys directly onto that object. If application code reuses the same options dict across calls a confi...

PYSEC-2026-4167 social-auth-core has an Improper Authentication issue

Impact The SAML backend accepted SAML responses on the Assertion Consumer Service endpoint without verifying that they matched a previously issued AuthnRequest. Applications using SAML account association could allow an attacker with a valid account on a trusted IdP to link the attacker's SAML...

PYSEC-2026-4062 lightrag-hku: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks

Summary The POST /login endpoint has no rate limiting, account lockout, or delay on failed attempts. An attacker can submit unlimited password guesses at full network speed. Details python lightrag/api/lightragserver.py:2161 @app.post"/login" async def loginformdata: OAuth2PasswordRequestForm =...

PYSEC-2026-4031 Autobahn Python permessage-deflate bypasses maxMessagePayloadSize after inflation

Summary Autobahn Python enforces maxMessagePayloadSize against the compressed WebSocket frame length before permessage-deflate inflation, then delivers the inflated message to application callbacks without a second size check. A client frame that is only 22 compressed bytes can inflate to 4096...

PYSEC-2026-4091 MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

Summary This is an arbitrary local file READ vulnerability on the Confluence and Jira uploadattachment tool paths. It's the symmetric counterpart of the file-write vulnerability you patched as CVE-2026-27825. The write direction was fixed; the read direction was left open. Reporter: Sean Valentin...

PYSEC-2026-4101 MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files

Summary MCP Atlassian exposes Jira and Confluence attachment upload tools that accept arbitrary local filesystem paths and upload those file contents to Atlassian. In HTTP or multi-user deployments, an MCP caller who can invoke write tools can cause the server to read any file accessible to the M...

PYSEC-2026-4070 LiteLLM Proxy has server-side request forgery via the `user_config` request parameter

Summary A server-side request forgery in LiteLLM Proxy lets an authenticated caller redirect the proxy's outbound request to a host of their choosing by smuggling an apibase inside the userconfig request body, bypassing the existing parameter guard. Details LiteLLM Proxy validates request bodies...

PYSEC-2026-4038 djust has an unauthenticated arbitrary module import via the WebSocket/SSE view-mount path

Impact The djust live transport resolves the LiveView to mount from a client-supplied dotted path by calling importmodulepath, .... The module is imported — running its top-level code import side effects — before the framework checks that the resolved object is a LiveView subclass and before any...