{"id":"CVE-2026-111062","published":"2026-11-05T21:18:35.607","lastModified":"2026-11-05T22:17:43.317","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-347"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2","tags":[]},{"url":"https://github.com/Eugeny/russh/pull/759","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.64.0","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf","tags":[]}],"exploitRefs":[{"url":"https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2","tags":[]},{"url":"https://github.com/Eugeny/russh/pull/759","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.64.0","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf","tags":[]}],"hasPoc":true,"ai":null}