PYSEC-2026-3456

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER, CER, and DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs, so a small crafted payload containing an OID with many arcs consumes excessive CPU per decode call and c...

Open Babel has an out-of-bounds read in CIF transform3d::DescribeAsString

Summary A memory-safety vulnerability in Open Babel's CIF file format parser allowed an out-of-bounds read when reading a crafted input file. Details The flaw was in OpenBabel::transform3d::DescribeAsString. A malformed symmetry-operation string caused the parser to read past the end of its...

py7zr: Decompression bomb (zip bomb) denial of service via unchecked extraction size

py7zr's Worker.decompress extracts archive entries without tracking total decompressed size. A crafted .7z file can exhaust disk or memory before the extraction completes.Measured: 15.6 KB archive → 100 MB output 6,556:1 ratio.Proof of concept:pythonimport py7zr, tempfile, os create bomb: compres...

Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders

SummaryStanza 1.12.0 attempts to safely load PyTorch checkpoint files using torch.load..., weightsonly=True, but automatically falls back to the fully unsafe torch.load..., weightsonly=False when the safe load raises pickle.UnpicklingError. Because the UnpicklingError condition is fully...

jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories

Summaryjupyterlab-git 0.53.0 latest, 2026-04-30 uses fnmatch.fnmatchcase in GitHandler.prepare jupyterlabgit/handlers.py:91 to enforce the admin-configured excludedpaths security control. Because fnmatchcase is unconditionally case-sensitive, an authenticated user on a case-insensitive filesystem...

Python Liquid: Infinite loop when parsing malformed `{% case %}` tags

ImpactGiven a malformed % case % tag without associated % when % or % else % block, and no terminating % endcase % tag, Python Liquid hangs in an infinite loop at parse time. This allows malicious template authors to craft templates for a denial of service attack. PatchesThe issue is fixed in...

Bugsink: Issue event views can show an event from another project if its UUID is known

DescriptionBugsink issue event pages accept a direct event identifier from the URL and, in affected versions, look up that event without also requiring it to belong to the issue in the URL.This is a project-boundary authorization issue: a logged-in user with access to one project can view another...

FoundationAgents MetaGPT: Deserialization through flawed argument mapping via Message.check_instruct_content()

A weakness has been identified in FoundationAgents MetaGPT up to 0.8.2. This affects the function Message.checkinstructcontent of the file metagpt/schema.py. Executing a manipulation of the argument mapping can lead to deserialization. The attack is restricted to local execution. The exploit has...

Apache Airflow: Authenticated users can bypass the `is_safe_url` check

A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the issafeurl check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to apache-airflow 3.2.2 or later. As a defense-in-dept...

Apache Airflow has no certificate validation on SMTP STARTTLS connections

Apache Airflow's EmailOperator and the underlying airflow.utils.email helpers established SMTP STARTTLS connections without verifying the remote certificate when the deployment used email smtpstarttls=True without email smtpssl. An attacker positioned between the worker and the configured SMTP...

agno contains a SQL injection vulnerability

agno 2.6.5 contains a SQL injection vulnerability in the ClickHouse vector database backend that allows attackers to inject arbitrary SQL expressions by supplying malicious metadata keys and values to the deletebymetadata method. Attackers can exploit the unsafe f-string interpolation in...

OpenStack Swift: s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body

In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently...

Prefect has an Argument Injection issue

A vulnerability in the GitHubRepository block of the prefect-github integration in Prefect version 3.6.18 allows an attacker to inject arbitrary git command-line options via the reference field. The reference field is concatenated directly into a git clone command string without proper...

Apache Fory PyFory Deserialization of Untrusted Data

Fory PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data using PyFory Python-native mode with strict mode disabled and relies o...

LiteLLM allows an authenticated internal_user to create API keys with access to routes that their role does not permit

LiteLLM prior to 1.83.14 allows an authenticated internaluser to create API keys with access to routes that their role does not permit. When generating a key, the allowedroutes field is stored without verifying that the specified routes fall within the user's own permissions. A key created with...

Regression in pymdownx.snippets reintroduces sibling-prefix path traversal bypass despite restrict_base_path

Summarypymdownx.snippets has a regression of the CVE-2023-32309 / GHSA-jh85-wwv9-24hv fix. With restrictbasepath: True the default, the current filename.startswithbase containment check does not enforce a directory boundary. As a result, a markdown snippet directive can read files from sibling...

NiceGUI: Unauthenticated log-volume denial of service in dynamic resource routes

SummaryTwo FastAPI routes that serve per-component static assets in NiceGUI accept a sub-path parameter that may resolve to a directory rather than a file. Requests that resolve to a directory raise an unhandled RuntimeError inside Starlette's FileResponse, which Uvicorn writes to the server log ...

Weblate: Stored HTML injection in editor search preview

ImpactWeblate's live search preview renders unit source and context as HTML without escaping. Any contributor whose content reaches those fields stores HTML and CSS that runs inside the authenticated editor of every user who runs a matching search. Patches...

Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed

SummaryThe /api/v1/utils/code/execute endpoint executes arbitrary Python code via Jupyter for any verified user, even when the admin has set ENABLECODEEXECUTION=false. The feature gate is not enforced on the API endpoint — the configuration says "disabled" but code still executes. DetailsThe admi...

Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts

SummaryThe LDAP and OAuth authentication flows use a TOCTOU Time-of-Check-Time-of-Use pattern for first-user admin role assignment. The regular signup handler signuphandler in auths.py, line 663 was explicitly patched to prevent this race with the comment "Insert with default role first to avoid...

AstrBot: File upload vulnerability in the function post_file of the file astrbot/dashboard/routes/chat.py

A vulnerability was detected in AstrBotDevs AstrBot up to 4.23.5. Impacted is the function postfile of the file astrbot/dashboard/routes/chat.py of the component File Upload Handler. The manipulation of the argument filename results in path traversal. It is possible to launch the attack remotely...

Open WebUI: Low-privilege authenticated users can enumerate and stop global background tasks, causing system-wide chat disruption

SummaryAny authenticated user with low privileges can enumerate active background tasks across the system and stop tasks belonging to other users via the GET /api/tasks and POST /api/tasks/stop/taskid methods. This allows a casual user to disrupt system-wide chat usage by continuously canceling...

Open WebUI has stored XSS via unsanitized Office/Excel/DOCX file preview rendering ({@html} without DOMPurify)

Related advisoryThis advisory tracks a regression of the original Excel-preview XSS that was publicly disclosed and patched under GHSA-jwf8-pv5p-vhmc patched in v0.8.0. The same root cause — XLSX.utils.sheettohtml output rendered via @html excelHtml without DOMPurify — was reintroduced sometime...

Open WebUI Vulnerable to SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py)

SummaryA Server-Side Request Forgery SSRF vulnerability exists in processpictureurl in backend/openwebui/utils/oauth.py line 1338. The function fetches arbitrary URLs from OAuth picture claims without applying validateurl, allowing an attacker to force the server to make HTTP requests to internal...

Open WebUI has Broken Access Control for Completions API

SummaryAny user X can continue the conversation of any other user Y, as long as the Chat ID of Y is known. User X does not even need to be an admin to do so. DetailsA user just needs to use the API endpoint: /api/chat/completions with their own API key generated in OWUI and the Chat ID of another...

Open WebUI Vulnerable to Cross-Site Request Forgery (CSRF) via Image URL Manipulation

SummaryAn application-wide Cross-Site Request Forgery CSRFvulnerability was found Open-WebUl's image uploading functionality. An attacker can set an image URL to a malicious endpoint, allowing them to perform actions on behalf of a victim user. Any authenticated user can exploit this vulnerabilit...

Open WebUI has Stored Cross-Site Scripting In Profile Picture

SummaryThe profileimageurl field on the user profile update form accepted arbitrary data: URI values without MIME-type validation. Two distinct attack paths were independently demonstrated by separate reporters:1. data:text/html;base64,... in a new browser tab raresvis, 2025-04-17 — when a victim...

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

DescriptionThe LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

pgAdmin 4: Improper restriction of excessive authentication attempts

Improper restriction of excessive authentication attempts CWE-307 in pgAdmin 4.pgAdmin enforces MAXLOGINATTEMPTS only inside its custom /authenticate/login view. Flask-Security's default /login view, which is registered automatically by security.initapp and is reachable on every server, never...

SQL injection vulnerability in pgAdmin 4 Maintenance Tool

SQL injection vulnerability in pgAdmin 4 Maintenance Tool.Four user-supplied JSON fields bufferusagelimit, vacuumparallel, vacuumindexcleanup, reindextablespace were concatenated directly into the rendered VACUUM/ANALYZE/REINDEX command and passed to psql --command. An authenticated user with the...

pgAdmin 4: Stored cross-site scripting (XSS) vulnerability in Browser Tree and Explain Visualizer modules

Stored cross-site scripting XSS vulnerability in pgAdmin 4 Browser Tree and Explain Visualizer modules.User-controlled PostgreSQL object names database, schema, table, column, etc. were assigned to DOM elements via innerHTML, allowing crafted object names containing HTML markup to execute...

pgAdmin 4 contains local file inclusion (LFI) and server-side request forgery (SSRF) vulnerabilities

Local file inclusion LFI and server-side request forgery SSRF vulnerabilities in pgAdmin 4 LLM API configuration endpoints.User-supplied apikeyfile and apiurl preferences were passed to the LLM provider clients without validation. An authenticated user could read arbitrary server-side files by...

Open WebUI has Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order

Vulnerability DetailsCWE-79: Cross-site Scripting XSSThe AccountPending.svelte component renders the admin-configured "Pending User Overlay Content" using marked.parse inside @html with an incorrect DOMPurify application order: Vulnerable Codesrc/lib/components/layout/Overlay/AccountPending.svelt...

Open WebUI vulnerable to Global Knowledge Base Enumeration via knowledge-bases Meta-Collection

Global Knowledge Base Enumeration via knowledge-bases Meta-Collection Affected ComponentRetrieval collection access validation:- backend/openwebui/routers/retrieval.py lines 2330-2355, validatecollectionaccess- backend/openwebui/routers/retrieval.py query endpoints, e.g. POST /query/doc Affected...

Bunsink has an SSRF bypass in `validate_webhook_url`

SummaryBugsink’s webhook URL validation in versions 2.1.2 and earlier could be partially bypassed because of a mismatch in URL parsing.In some malformed URLs, Python’s standard URL parser urllib and the HTTP client stack requests / urllib3 do not agree on which host is actually being targeted. Th...

JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

IKUS Rdiffweb allows an attacker with any valid or stolen access token to act as other users

IKUS Rdiffweb version 2.10.5 and below have an improper authorization flaw that allows an attacker with any valid or stolen access token to act as other users. The API does not enforce binding between the authenticated subject and the targeted user/tenant, so crafted requests can read or modify...

Prefect SSRF Bypass via DNS Rebinding in validate_restricted_url

A vulnerability has been found in PrefectHQ prefect up to 3.6.28.dev1. Affected by this vulnerability is the function validaterestrictedurl of the component Webhook/Notification. The manipulation leads to time-of-check time-of-use. It is possible to initiate the attack remotely. The attack is...

Prefect Unauthenticated Event Injection via /api/events/in WebSocket

A flaw has been found in PrefectHQ prefect up to 3.6.13. Affected is an unknown function of the file /api/events/in of the component WebSocket Endpoint. Executing a manipulation can lead to missing authentication. The attack may be performed from remote. The exploit has been published and may be...

Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS

ImpactA stored Cross-Site Scripting XSS vulnerability in Jupyter Notebook allows attackers to steal authentication tokens from users who open malicious notebook files and interact with elements that the attacker can make look indistinguishable from legitimate controls single click interaction.The...

AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache

SummaryAWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

Langflow has an Information Leak through Incomplete API Key Redaction

A weakness has been identified in langflow-ai langflow up to 1.8.3. Impacted is the function removeapikeys/hasapiterms of the file src/backend/base/langflow/api/utils/core.py of the component Flow Using API. This manipulation causes unprotected storage of credentials. The attack can be initiated...

Langflow: Cleartext Storage of Authentication Settings in Project Creation Endpoint

A security vulnerability has been detected in langflow-ai langflow up to 1.8.3. The affected element is the function createproject/encryptauthsettings of the file src/backend/base/Langflow/api/v1/projects.py of the component Project Creation Endpoint. Such manipulation of the argument authsetting...

pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values. PatchesThis has been fixed in pypdf==6.10.2. WorkaroundsIf you cannot upgrade yet, consider applying the changes from P...

Neo4j Labs MCP Servers: SSRF and Data Modification via read_only Mode Bypass Through CALL Procedures

SummaryThe readonly mode in mcp-neo4j-cypher versions prior to 0.6.0 can be bypassed using CALL procedures. Details ImpactThe enforcing of readonly mode in vulnerable versions could be bypassed by certain APOC procedures. Patchesv0.6.0 release hardened the checks around the mode. The only way to...

pypdf: Possible long runtimes for wrong size values in incremental mode

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer /Size value in incremental mode. PatchesThis has been fixed in pypdf==6.10.2. WorkaroundsIf you cannot upgrade yet, consider applying the changes from PR 37...

LangSmith SDK: Streaming token events bypass output redaction

SummaryThe LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When an LLM run produces streaming output, each chunk is recorded as a newtoken event containing the raw token value. These events bypass the redaction pipeline...

Apache Airflow: JWT token appearing in logs

JWT Tokens used by tasks were exposed in logs. This could allow UI users to act as Dag Authors. Users are advised to upgrade to Airflow version that contains fix.Users are recommended to upgrade to version 3.2.0, which fixes this issue...

MetaGPT affected by server-side request forgery in metagpt/utils/common.py

A security flaw has been discovered in FoundationAgents MetaGPT up to 0.8.2. This impacts the function decodeimage of the file metagpt/utils/common.py. The manipulation of the argument imgurlorb64 results in server-side request forgery. It is possible to launch the attack remotely. The exploit ha...

pypdf has long runtimes for wrong size values in cross-reference and object streams

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large /Size values or object streams with wrong large /N values. PatchesThis has been fixed in pypdf==6.10.1. WorkaroundsIf you cannot upgrade yet, consider...