PYSEC-2026-1070 Malicious code in langchain-core-mcp (PyPI)

Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of langchain-core-mcp were published to PyPI using stolen credentials. The package executes a bundled JavaScript payload via the Bun runtime on import that harvests and exfiltrates...

PYSEC-2026-1294 Unfurl's unbounded zlib decompression allows decompression bomb DoS

Summary The compressed data parser uses zlib.decompress without a maximum output size. A small, highly compressed payload can expand to a very large output, causing memory exhaustion and denial of service. Details - unfurl/parsers/parsecompressed.py calls zlib.decompressdecoded with no size limit...

Unfurl's unbounded zlib decompression allows decompression bomb DoS

SummaryThe compressed data parser uses zlib.decompress without a maximum output size. A small, highly compressed payload can expand to a very large output, causing memory exhaustion and denial of service. Details- unfurl/parsers/parsecompressed.py calls zlib.decompressdecoded with no size limit.-...

PYSEC-2026-2020 vLLM vulnerable to Server-Side Request Forgery (SSRF) through MediaConnector

Summary A Server-Side Request Forgery SSRF vulnerability exists in the MediaConnector class within the vLLM project's multimodal feature set. The loadfromurl and loadfromurlasync methods obtain and process media from URLs provided by users, using different Python parsing libraries when restrictin...

vLLM vulnerable to Server-Side Request Forgery (SSRF) through MediaConnector

SummaryA Server-Side Request Forgery SSRF vulnerability exists in the MediaConnector class within the vLLM project's multimodal feature set. The loadfromurl and loadfromurlasync methods obtain and process media from URLs provided by users, using different Python parsing libraries when restricting...

PYSEC-2026-2047 Wheel Affected by Arbitrary File Permission Modification via Path Traversal in wheel unpack

Summary - Vulnerability Type: Path Traversal CWE-22 leading to Arbitrary File Permission Modification. - Root Cause Component: wheel.cli.unpack.unpack function. - Affected Packages: 1. wheel Upstream source 2. setuptools Downstream, vendors wheel - Severity: High Allows modifying system file...

Tendenci Affected by Authenticated Remote Code Execution via Pickle Deserialization

A critical deserialization vulnerability exists in Tendenci Helpdesk module NOTE, by default, Helpdesk is NOT enabled, affecting the version 15.3.11 and earlier. This vulnerability allows remote code execution RCE by an authenticated user with staff security level due to using Python's pickle...

Wheel Affected by Arbitrary File Permission Modification via Path Traversal in wheel unpack

Summary - Vulnerability Type: Path Traversal CWE-22 leading to Arbitrary File Permission Modification. - Root Cause Component: wheel.cli.unpack.unpack function. - Affected Packages: 1. wheel Upstream source 2. setuptools Downstream, vendors wheel - Severity: High Allows modifying system file...

PYSEC-2026-1950 Tendenci Affected by Authenticated Remote Code Execution via Pickle Deserialization

A critical deserialization vulnerability exists in Tendenci Helpdesk module NOTE, by default, Helpdesk is NOT enabled, affecting the version 15.3.11 and earlier. This vulnerability allows remote code execution RCE by an authenticated user with staff security level due to using Python's pickle...

PYSEC-2026-1201 Authlib has 1-click Account Takeover vulnerability

Security Advisory: Cache-Backed State Storage CSRF in Authlib The Security Labs team at Snyk has reported a security issue affecting Authlib, identified during a recent research project. The Snyk Security Labs team has identified a vulnerability that can result in a one-click account takeover in...

PYSEC-2026-1701 NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links

Summary An unsafe implementation in the click event listener used by ui.subpages, combined with attacker-controlled link rendering on the page, causes an XSS when the user actively clicks on the link. Details 1. On click, eventually subpagesnavigate event is emitted...

PYSEC-2026-1703 NiceGUI has Redis connection leak via tab storage causes service degradation

Summary An unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit. NiceGUI continues accepting...

Authlib has 1-click Account Takeover vulnerability

Security Advisory: Cache-Backed State Storage CSRF in AuthlibThe Security Labs team at Snyk has reported a security issue affecting Authlib, identified during a recent research project.The Snyk Security Labs team has identified a vulnerability that can result in a one-click account takeover in...

NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links

SummaryAn unsafe implementation in the click event listener used by ui.subpages, combined with attacker-controlled link rendering on the page, causes an XSS when the user actively clicks on the link. Details1. On click, eventually subpagesnavigate event is...

NiceGUI has Redis connection leak via tab storage causes service degradation

SummaryAn unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation when Redis hits its connection limit.NiceGUI continues accepting ne...

NiceGUI apps which use `ui.sub_pages` vulnerable to zero-click XSS

SummaryAn unsafe implementation in the pushstate event listener used by ui.subpages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. DetailsThe problem is traced as follows:1. On pushstate, handleStateEvent is...

PYSEC-2026-1702 NiceGUI apps which use `ui.sub_pages` vulnerable to zero-click XSS

Summary An unsafe implementation in the pushstate event listener used by ui.subpages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. Details The problem is traced as follows: 1. On pushstate, handleStateEvent is...

PYSEC-2026-1223 Bokeh server applications have Incomplete Origin Validation in WebSockets

This vulnerability allows for Cross-Site WebSocket Hijacking CSWSH of a deployed Bokeh server instance. Scope This vulnerability is only relevant to deployed Bokeh server instances. There is no impact on static HTML output, standalone embedded plots, or Jupyter notebook usage. This vulnerability...

PYSEC-2026-1582 loggingredactor converts non-string types to string types in logs

Impact Non-string types are converted into string types, leading to type errors in %d conversions. Patches The problem has been patched in version 0.0.6. Workarounds None without patching. Resources Issue report: https://github.com/armurox/loggingredactor/issues/7 Release:...

Picklescan is vulnerable to RCE through missing detection when calling numpy.f2py.crackfortran._eval_length

SummaryPicklescan uses the numpy.f2py.crackfortran.evallength function a NumPy F2PY helper to execute arbitrary Python code during unpickling. DetailsPicklescan fails to detect a malicious pickle that uses the gadget numpy.f2py.crackfortran.evallength in reduce, allowing arbitrary command executi...