PYSEC-2026-1226 Bugsink path traversal via event_id in ingestion

Summary In affected versions, ingestion paths construct file locations directly from untrusted eventid input without validation. A specially crafted eventid can result in paths outside the intended directory, potentially allowing file overwrite or creation in arbitrary locations. Submitting such...

PYSEC-2026-1277 copyparty has DOM-Based XSS vulnerability when displaying multimedia metadata

Summary An unauthenticated attacker is able to execute arbitrary JavaScript code in a victim's browser due to improper sanitization of multimedia tags in music files, including m3u files. Details Multimedia metadata is rendered in the web-app without sanitization. This can be exploited in two way...

PYSEC-2026-1747 OpenEXR Heap-Based Buffer Overflow in Deep Scanline Parsing via Forged Unpacked Size

Summary The OpenEXRCore code is vulnerable to a heap-based buffer overflow during a write operation when decompressing ZIPS-packed deep scan-line EXR files with a maliciously forged chunk header. Details When parsing STORAGEDEEPSCANLINE chunks from an EXR file, the following code from...

PYSEC-2026-1606 MaterialX Null Pointer Dereference in getShaderNodes due to Unchecked nodeGraph->getOutput return

Summary When parsing shader nodes in a MTLX file, the MaterialXCore code accesses a potentially null pointer, which can lead to crashes with maliciously crafted files. Details In src/MaterialXCore/Material.cpp, in function getShaderNodes, the following code fetches the output nodes for a given...

PYSEC-2026-1749 OpenEXR Out-Of-Memory via Unbounded File Header Values

Summary The OpenEXR file format defines many information about the final image inside of the file header, such as the size of data/display window. The application trusts the value of dataWindow size provided in the header of the input file, and performs computations based on this value. This may...

PYSEC-2026-1746 OpenEXR Out of Bounds Heap Read due to Bad Pointer Arithmetic in LossyDctDecoder_execute

Summary The OpenEXRCore code is vulnerable to a heap-based buffer overflow during a read operation due to bad pointer math when decompressing DWAA-packed scan-line EXR files with a maliciously forged chunk. Details In the LossyDctDecoderexecute function from...

PYSEC-2026-1748 OpenEXR ScanLineProcess::run_fill NULL Pointer Write In "reduceMemory" Mode

Summary When reading a deep scanline image with a large sample count in reduceMemory mode, it is possible to crash a target application with a NULL pointer dereference in a write operation. Details In the ScanLineProcess::runfill function, implemented in...

PYSEC-2026-1683 MS SWIFT Remote Code Execution via unsafe PyYAML deserialization

Description A Remote Code Execution RCE vulnerability exists in the modelscope/ms-swift project due to unsafe use of yaml.load in combination with vulnerable versions of the PyYAML library ≤ 5.3.1. The issue resides in the tests/run.py script, where a user-supplied YAML configuration file is...

PYSEC-2026-1941 Starlette has possible denial-of-service vector when parsing large files in multipart forms

Summary When parsing a multi-part form with large files greater than the default max spool size starlette will block the main thread to roll the file over to disk. This blocks the event thread which means we can't accept new connections. Details Please see this discussion for details:...

PYSEC-2026-1926 Skops may allow MethodNode to access unexpected object fields through dot notation, leading to arbitrary code execution at load time

Summary An inconsistency in MethodNode can be exploited to access unexpected object fields through dot notation. This can be used to achieve arbitrary code execution at load time. While this issue may seem similar to https://github.com/skops-dev/skops/security/advisories/GHSA-m7f4-hrc6-fwg3, it i...

PYSEC-2026-1286 Dagster Local File Inclusion vulnerability

Local File Inclusion in dagster.grpc.impl.getnotebookdata in Dagster 1.10.14 allows attackers with access to the gRPC server to read arbitrary files by supplying path traversal sequences in the notebookpath field of ExternalNotebookData requests, bypassing the intended extension-based check...

PYSEC-2026-1927 Skops has Inconsistent Trusted Type Validation that Enables Hidden `operator` Methods Execution

Summary An inconsistency in OperatorFuncNode can be exploited to hide the execution of untrusted operator.xxx methods. This can then be used in a code reuse attack to invoke seemingly safe functions and escalate to arbitrary code execution with minimal and misleading trusted types. Note: This...

PYSEC-2026-1235 Calibre Web and Autocaliweb have OS Command Injection vulnerability

Improper Neutralization of Special Elements used in an OS Command 'OS Command Injection' vulnerability in Calibre Web, Autocaliweb allows Blind OS Command Injection. This issue affects Calibre Web: 0.6.24 Nicolette; Autocaliweb: from 0.7.0 before 0.7.1...

PYSEC-2026-1228 Calibre Web and Autocaliweb have a ReDoS vulnerability

ReDoS in stripwhitespaces function in cps/stringhelper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. This issue affects Calibre Web: 0.6.24...

PYSEC-2026-1360 FastAPI Guard has a regex bypass

Summary The regular expression patched to mitigate the ReDoS vulnerability by limiting the length of string fails to catch inputs that exceed this limit. Details In version 3.0.1, you can find a commit like the one in the link below, which was made to prevent ReDoS...

PYSEC-2026-1194 Assemblyline 4 service client vulnerable to Arbitrary Write through path traversal in Client code

Path-Traversal - Arbitrary File Write in Assemblyline Service Client IMPORTANT: This vulnerability is valid if you decide to use the assemblyline-service-client outside of the normal practice to using Assemblyline in a production environment. In practice, this code should always be executed withi...

PYSEC-2026-1104 AIOHTTP is vulnerable to HTTP Request/Response Smuggling through incorrect parsing of chunked trailer sections

Summary The Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. Impact If a pure Python version of aiohttp is installed i.e. without the usual C extensions or AIOHTTPNOEXTENSIONS is enabled, then an attacker may be able to execu...

PYSEC-2026-1087 Aim vulnerable to Cross-site Scripting

Cross-site Scripting XSS in aimhubio Aim 3.28.0 allows remote attackers to execute arbitrary JavaScript in victims browsers via malicious Python code submitted to the /api/reports endpoint, which is interpreted and executed by Pyodide when the report is viewed. No sanitisation or sandbox...

PYSEC-2026-1823 `pyLoad` has Path Traversal Vulnerability in `json/upload` Endpoint that allows Arbitrary File Write

Summary An authenticated path traversal vulnerability exists in the /json/upload endpoint of the pyLoad By manipulating the filename of an uploaded file, an attacker can traverse out of the intended upload directory, allowing them to write arbitrary files to any location on the system accessible ...

PYSEC-2026-1566 LlamaIndex vulnerable to data loss through hash collisions in its DocugamiReader class

A vulnerability in the DocugamiReader class of the run-llama/llamaindex repository, up to but excluding version 0.12.41, involves the use of MD5 hashing to generate IDs for document chunks. This approach leads to hash collisions when structurally distinct chunks contain identical text, resulting ...

PYSEC-2026-1287 Dagster vulnerable to Path Traversal attack through its /logs endpoint

Directory Traversal vulnerability in dagster-webserver Dagster thru 1.5.10 allows remote attackers to obtain sensitive information via crafted request to the /logs endpoint. This may be restricted to certain file names that start with a dot '.'...

PYSEC-2026-1462 Indico vulnerability allows attackers to bulk dump user details

Impact An endpoint used to display details of users listed in certain fields such as ACLs could be misused to dump basic user details such as name, affiliation and email in bulk. !TIP If your instance allows everyone to create a user account, and you wish to truly restrict access to these user...

PYSEC-2026-1977 Transformers is vulnerable to ReDoS attack through its DonutProcessor class

A Regular Expression Denial of Service ReDoS vulnerability was discovered in the Hugging Face Transformers library, specifically within the DonutProcessor class's token2json method. This vulnerability affects versions 4.51.3 and earlier, and is fixed in version 4.52.1. The issue arises from the...

PYSEC-2026-1359 fastapi-guard is vulnerable to ReDoS through inefficient regex

Summary fastapi-guard detects penetration attempts by using regex patterns to scan incoming requests. However, some of the regex patterns used in detection are extremely inefficient and can cause polynomial complexity backtracks when handling specially crafted inputs. It is not as severe as...

PYSEC-2026-1822 pyLoad is vulnerable to attacks that bypass localhost restrictions, enabling the creation of arbitrary packages

Summary Any unauthenticated attacker can bypass the localhost restrictions posed by the application and utilize this to create arbitrary packages. Details Any unauthenticated attacker can bypass the localhost restrictions posed by the application and utilize this to create arbitrary packages. Thi...

PYSEC-2026-1352 ExecuTorch vulnerable to Heap-based Buffer Overflow attack

A heap-buffer-overflow vulnerability in the loading of ExecuTorch methods can cause the runtime to crash and potentially result in code execution or other undesirable effects. This issue affects ExecuTorch prior to commit 93b1a0c15f7eda49b2bc46b5b4c49557b4e9810f...

PYSEC-2026-1559 LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing

The JSONReader in run-llama/llamaindex versions 0.12.28 is vulnerable to a stack overflow due to uncontrolled recursive JSON parsing. This vulnerability allows attackers to trigger a Denial of Service DoS by submitting deeply nested JSON structures, leading to a RecursionError and crashing...

PYSEC-2026-1558 LlamaIndex vulnerable to Path Traversal attack through its encode_image function

A path traversal vulnerability exists in run-llama/llamaindex versions 0.11.23 through 0.12.40, specifically within the encodeimage function in genericutils.py. This vulnerability allows an attacker to manipulate the imagepath input to read arbitrary files on the server, including sensitive syste...

PYSEC-2026-1536 py-libp2p is vulnerable to DoS attacks through use of large RSA keys

py-libp2p before 0.2.3 allows a peer to cause a denial of service resource consumption via a large RSA key...

PYSEC-2026-1570 LlamaIndex has an XML Entity Expansion vulnerability in its sitemap parser

An XML Entity Expansion vulnerability, also known as a 'billion laughs' attack, exists in the sitemap parser of the run-llama/llamaindex repository, specifically affecting the Papers Loaders package before version 0.3.2 in llama-index v0.10.0 and above through v0.12.29. This vulnerability allows ...

PYSEC-2026-1985 Transformers vulnerable to ReDoS attack through its get_imports() function

A Regular Expression Denial of Service ReDoS vulnerability was discovered in the Hugging Face Transformers library, specifically in the getimports function within dynamicmoduleutils.py. This vulnerability affects versions 4.49.0 and is fixed in version 4.51.0. The issue arises from a regular...

PYSEC-2026-1567 LlamaIndex vulnerability in its ObsidianReader class can lead to Path Traversal exploit

A vulnerability in the ObsidianReader class of the run-llama/llamaindex repository, before version 0.5.2 specifically in version 0.12.27 of llama-index, allows for hardlink-based path traversal. This flaw permits attackers to bypass path restrictions and access sensitive system files, such as...

PYSEC-2026-1987 Transformers's ReDoS vulnerability in get_configuration_file can lead to catastrophic backtracking

A Regular Expression Denial of Service ReDoS vulnerability was discovered in the Hugging Face Transformers library, specifically in the getconfigurationfile function within the transformers.configurationutils module. The affected version is 4.49.0, and the issue is resolved in version 4.51.0. The...

PYSEC-2026-1986 Transformers's Improper Input Validation vulnerability can be exploited through username injection

Hugging Face Transformers versions up to 4.49.0 are affected by an improper input validation vulnerability in the imageutils.py file. The vulnerability arises from insecure URL validation using the startswith method, which can be bypassed through URL username injection. This allows attackers to...

PYSEC-2026-1618 MCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service

If a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and...

PYSEC-2026-1564 LlamaIndex has Incomplete Documentation of Program Execution related to JsonPickleSerializer component

Incomplete Documentation of Program Execution exists in the run-llama/llamaindex library's JsonPickleSerializer component, affecting versions v0.12.27 through v0.12.40. This vulnerability allows remote code execution due to an insecure fallback to Python's pickle module. JsonPickleSerializer...

PYSEC-2026-1979 Transformers vulnerable to ReDoS attack through its SETTING_RE variable

A Regular Expression Denial of Service ReDoS vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the SETTINGRE variable within the transformers/commands/chat.py file. The...

PYSEC-2026-1590 Lord of Large Language Models vulnerable to Observable Discrepancy attack via authenticate_user function

The parisneo/lollms repository is affected by a timing attack vulnerability in the authenticateuser function within the lollmsauthentication.py file. This vulnerability allows attackers to enumerate valid usernames and guess passwords incrementally by analyzing response time differences. The...

PYSEC-2026-1511 Langchain-Chatchat vulnerable to path traversal

A vulnerability classified as problematic was found in chatchat-space Langchain-Chatchat up to 0.3.1. This vulnerability affects unknown code of the file /v1/files?purpose=assistants. The manipulation leads to path traversal. The attack can be initiated remotely. The exploit has been disclosed to...

PYSEC-2026-1569 LlamaIndex vulnerability in ArxivReader class can cause MD5 hash collisions

A vulnerability in the ArxivReader class of the run-llama/llamaindex repository allows for MD5 hash collisions when generating filenames for downloaded papers. This can lead to data loss as papers with identical titles but different contents may overwrite each other, preventing some papers from...

PYSEC-2026-1568 LlamaIndex is vulnerable to Path Traversal attack through its ObsidianReader class

A vulnerability in the ObsidianReader class in LlamaIndex Readers Integration: Obsidian before version 0.5.1 from the run-llama/llamaindex repository versions 0.12.23 to 0.12.28 allows for arbitrary file read through symbolic links. The ObsidianReader fails to resolve symlinks to their real paths...

PYSEC-2026-1616 MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS

A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability 500 errors until manually restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Thank y...

PYSEC-2026-1512 Langchain-Chatchat vulnerable to path traversal

A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may ...

PYSEC-2026-2039 Weblate lacks rate limiting when verifying second factor

Impact The verification of the second factor was not subject to rate limiting. The absence of rate limiting on the second factor endpoint allows an attacker with valid credentials to automate OTP guessing. Patches This issue has been addressed in Weblate 5.12 via...

PYSEC-2026-1576 LLaMA-Factory allows Code Injection through improper vhead_file safeguards

Summary A critical remote code execution vulnerability was discovered during the Llama Factory training process. This vulnerability arises because the vheadfile is loaded without proper safeguards, allowing malicious attackers to execute arbitrary malicious code on the host system simply by passi...

PYSEC-2026-1806 protobuf-python has a potential Denial of Service issue

Summary Any project that uses Protobuf pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP tags can be corrupted by exceeding the Python recursion limit. Reporter: Alexis Challande, Trail of Bits...

PYSEC-2026-2038 Weblate exposes personal IP address via e-mail

Impact The audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters. Patches This issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/15102. References Thanks to...

PYSEC-2026-1539 HKUDS LightRAG allows Path Traversal via function upload_to_input_dir

A vulnerability was found in HKUDS LightRAG up to 1.3.8. It has been declared as critical. Affected by this vulnerability is the function uploadtoinputdir of the file lightrag/api/routers/documentroutes.py of the component File Upload. The manipulation of the argument file.filename leads to path...

PYSEC-2026-1896 Salt's worker process vulnerable to denial of service through file read operation

Worker process denial of service through file read operation. .A vulnerability exists in the Master's “pubret” method which is exposed to all minions. The un-sanitized input value “jid” is used to construct a path which is then opened for reading. An attacker could exploit this vulnerabilities by...

PYSEC-2026-1844 pyspur Incomplete Filtering of Special Elements allowed by SingleLLMCallNode function

A vulnerability was found in PySpur-Dev pyspur up to 0.1.18. It has been classified as critical. Affected is the function SingleLLMCallNode of the file backend/pyspur/nodes/llm/singlellmcall.py of the component Jinja2 Template Handler. The manipulation of the argument usermessage leads to imprope...