CVE-2026-54590

Publié : 8 juillet 2026

Modifié : 8 juillet 2026

Score CVSS

5.9

MEDIUM

Description détaillée

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.

Vecteur d'attaque (CVSS)

Vecteur brut :CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Références et Patchs

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

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