CVE-2026-54590

AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed in version 2.23.1.

• CWE-22
• CWE-639

• https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88
• https://github.com/ronf/asyncssh/releases/tag/v2.23.1
• https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh
• https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh

Published

Jul 8, 2026

Last Modified

Jul 10, 2026

Status

Deferred

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-54572Rclone is a command-line program to sync files and directori…8.8
• CVE-2026-54573Outline is a service that allows for collaborative documenta…5.3
• CVE-2026-54574proot-distro is a utility for managing proot containers. Pri…8.2
• CVE-2026-5458A weakness has been identified in Noelse Individuals & Pro A…3.3
• CVE-2026-54588Poweradmin is a web-based DNS administration tool for PowerD…9.6
• CVE-2026-5459The User Frontend: AI Powered Frontend Posting, User Directo…5.3
• CVE-2026-54591AsyncSSH is a Python package which provides an asynchronous …8.1
• CVE-2026-54592Oj (Optimized JSON) is a JSON parser and Object marshaller p…7.5
• CVE-2026-54593Pterodactyl is a free, open-source game server management pa…8.1
• CVE-2026-5460A heap use-after-free exists in wolfSSL's TLS 1.3 post-quant…6.5
• CVE-2026-54601FastGPT is an open source AI knowledge base platform. From 4…6.3
• CVE-2026-54602FastGPT is a knowledge-based AI application platform. Prior …7.1