{"id":"CVE-2026-111062","summary":"A russh SSH server accepts a publickey authentication whose signature uses a different algorithm than the one named in the request","details":"russh is a Rust SSH client and server library. From version 0.34.0-beta.1 until version 0.64.0, its SSH server does not require the signature algorithm in a public-key authentication signature to match the algorithm named in the authentication request. A client possessing an authorized RSA private key can announce  rsa-sha2-512  while supplying a valid  ssh-rsa  SHA-1 signature, bypassing restrictions or producing misleading audit records when applications rely on the requested algorithm. A valid private-key signature remains required, and russh clients are not affected. This issue is fixed in version 0.64.0.","aliases":["GHSA-j7h2-66j4-ghjf"],"modified":"2026-11-07T02:48:21.720673490Z","published":"2026-11-05T20:47:35.854Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111062.json"},"references":[{"type":"WEB","url":"https://github.com/Eugeny/russh/releases/tag/v0.64.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111062.json"},{"type":"ADVISORY","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111062"},{"type":"FIX","url":"https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2"},{"type":"FIX","url":"https://github.com/Eugeny/russh/pull/759"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eugeny/russh","events":[{"introduced":"0"},{"fixed":"497314960942156301ab17221b1c681156239f39"},{"fixed":"a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0.34.0-beta.1"},{"fixed":"0.64.0"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"fixed":"a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2"}],"source":"REFERENCES_COMMIT"},{"original_tag":"v0.64.0","range":[{"fixed":"497314960942156301ab17221b1c681156239f39"}],"source":"REFERENCES_TAG"}]}}],"versions":["v0.63.3","v0.63.2","v0.63.1","v0.63.0","v0.63.0-beta.1","v0.62.7","v0.62.6","v0.62.5","v0.62.4","v0.62.3","v0.62.2","v0.62.1","v0.62.0","v0.61.2","v0.61.1","v0.61.0","v0.60.3","v0.60.2","v0.60.1","v0.60.0","v0.59.0","v0.58.0","v0.57.1","v0.57.0","v0.56.0","v0.55.0","v0.54.6","v0.54.5","v0.54.4","v0.54.3","v0.54.2","v0.54.1","v0.54.0","v0.53.0","v0.53.0-beta.1","v0.52.1","v0.52.0","v0.52.0-beta.1","v0.51.1","v0.51.0","v0.51.0-beta.3","v0.51.0-beta.2","v0.51.0-beta.1","v0.50.4","v0.50.3","v0.50.1","v0.50.0","v0.50.0-beta.12","v0.50.0-beta.11","v0.50.0-beta.10","v0.50.0-beta.9","v0.50.0-beta.8","v0.50.0-beta.7","v0.50.0-beta.6","v0.50.0-beta.5","v0.50.0-beta.4","v0.50.0-beta.3","v0.50.0-beta.2","v0.49.0","v0.48.2","v0.48.1","v0.48.0","v0.47.0-beta.4","v0.47.0-beta.3","v0.46.0","v0.45.0","v0.44.0","v0.44.0-beta.4","v0.44.0-beta.3","v0.44.0-beta.1","v0.43.0","v0.43.0-beta.1","v0.42.0","v0.40.2","v0.40.1","v0.40.0","v0.38.0","v0.39.0-beta.1","v0.38.0-beta.1","v0.37.1","v0.37.0","v0.36.1","v0.37.0-beta.1","0.37.0-beta.1","v0.35.0-beta.9","v0.35.0-beta.8","v0.35.0-beta.7","v0.35.0-beta.6","v0.35.0-beta.5","v0.35.0-beta.3","v0.35.0-beta.2","v0.35.0-beta.1","v0.34.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111062.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}