PYSEC-2026-1846 python-ldap is Vulnerable to Improper Encoding or Escaping of Output and Improper Null Termination

Summary ldap.dn.escapednchars escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP...

PYSEC-2026-1932 Python Social Auth - Django has unsafe account association

Impact Upon authentication, the user could be associated by e-mail even if the associatebyemail pipeline was not included. This could lead to account compromise when a third-party authentication service does not validate provided e-mail addresses or doesn't require unique e-mail addresses. Patche...

Python Social Auth - Django has unsafe account association

ImpactUpon authentication, the user could be associated by e-mail even if the associatebyemail pipeline was not included. This could lead to account compromise when a third-party authentication service does not validate provided e-mail addresses or doesn't require unique e-mail addresses. Patches...

python-ldap has sanitization bypass in ldap.filter.escape_filter_chars

SummaryThe sanitization method ldap.filter.escapefilterchars can be tricked to skip escaping of special characters when a crafted list or dict is supplied as the assertionvalue parameter, and the non-default escapemode=1 is configured. DetailsThe method ldap.filter.escapefilterchars supports 3...

PYSEC-2026-1847 python-ldap has sanitization bypass in ldap.filter.escape_filter_chars

Summary The sanitization method ldap.filter.escapefilterchars can be tricked to skip escaping of special characters when a crafted list or dict is supplied as the assertionvalue parameter, and the non-default escapemode=1 is configured. Details The method ldap.filter.escapefilterchars supports 3...

python-socketio vulnerable to arbitrary Python code execution (RCE) through malicious pickle deserialization in certain multi-server deployments

SummaryA remote code execution vulnerability in python-socketio versions prior to 5.14.0 allows attackers to execute arbitrary Python code through malicious pickle deserialization in multi-server deployments on which the attacker previously gained access to the message queue that the servers use...

PYSEC-2026-1854 python-socketio vulnerable to arbitrary Python code execution (RCE) through malicious pickle deserialization in certain multi-server deployments

Summary A remote code execution vulnerability in python-socketio versions prior to 5.14.0 allows attackers to execute arbitrary Python code through malicious pickle deserialization in multi-server deployments on which the attacker previously gained access to the message queue that the servers use...

pip's fallback tar extraction doesn't check symbolic links point to extraction directory

When extracting a tar archive pip may not check symbolic links point into the extraction directory if the tarfile module doesn't implement PEP 706. Note that upgrading pip to a "fixed" version for this vulnerability doesn't fix all known vulnerabilities that are remediated by using a Python versi...

PYSEC-2026-1795 pip's fallback tar extraction doesn't check symbolic links point to extraction directory

When extracting a tar archive pip may not check symbolic links point into the extraction directory if the tarfile module doesn't implement PEP 706. Note that upgrading pip to a "fixed" version for this vulnerability doesn't fix all known vulnerabilities that are remediated by using a Python versi...

PYSEC-2026-1784 Picklescan has a missing detection when calling built-in python idlelib.autocomplete.AutoComplete.get_entity

Summary Using idlelib.autocomplete.AutoComplete.getentity, which is a built-in python 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 idlelib.autocomplete.AutoComplete.getentity functio...

PYSEC-2026-1792 Picklescan is missing detection when calling built-in python ensurepip._run_pip

Summary Using ensurepip.runpip function, which is a built-in python 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 ensurepip.runpip function in reduce method Then when the victim after...

PyPDF's Manipulated FlateDecode streams can exhaust RAM

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. PatchesThis has been...

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...

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

SummaryThe Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. ImpactIf 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 execute...

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-2026-1104 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-2026-1618 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-2026-1590 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...

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 yo...

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...