{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-102643", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-29T15:56:02.100Z", "datePublished": "2026-11-09T21:51:35.575Z", "dateUpdated": "2026-11-09T21:51:35.575Z"}, "containers": {"cna": {"title": "AsyncSSH: SFTPServer Chroot Escape", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-50", "lang": "en", "description": "CWE-50: Path Equivalence: '//multiple/leading/slash'", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/ronf/asyncssh/security/advisories/GHSA-w29m-45fc-22v9", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ronf/asyncssh/security/advisories/GHSA-w29m-45fc-22v9"}, {"name": "https://github.com/ronf/asyncssh/commit/d4fc430d37b234cb35f1ba2cca834b2dbe1302cf", "tags": ["x_refsource_MISC"], "url": "https://github.com/ronf/asyncssh/commit/d4fc430d37b234cb35f1ba2cca834b2dbe1302cf"}, {"name": "https://github.com/ronf/asyncssh/releases/tag/v2.24.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/ronf/asyncssh/releases/tag/v2.24.1"}], "affected": [{"vendor": "ronf", "product": "asyncssh", "versions": [{"version": "< 2.24.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-09T21:51:35.575Z"}, "descriptions": [{"lang": "en", "value": "AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Prior to 2.24.1, SFTPServer.map_path() uses posixpath.normpath() on a client-supplied path and removes only one leading slash before passing the result to posixpath.join() with the configured chroot. An authenticated SFTP user can supply a path beginning with exactly two slash characters, causing POSIX normalization to preserve the double-leading-slash form and the subsequent join to treat the remaining pathname as absolute. This bypasses the SFTP chroot and permits reads and writes with the operating-system permissions of the account running the server, which may enable code execution depending on writable targets. This issue is fixed in version 2.24.1."}], "source": {"advisory": "GHSA-w29m-45fc-22v9", "discovery": "UNKNOWN"}}}}

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