{"id":"CVE-2026-116696","revision":"09ad68d960044bb193795f2491edf2f9","records":[{"revision":"09ad68d960044bb193795f2491edf2f9","observedAt":"2026-10-27T21:45:55.39+00:00","statement":{"source":"cve-program","id":"CVE-2026-116696","aliases":[],"title":"russh's SSH agent server is susceptible to unbound allocations via repeated SSH_AGENT_CONSTRAIN_CONFIRM messages","description":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.65.0, russh::keys::agent::server::serve in russh/src/keys/agent/server.rs accepts repeated SSH_AGENT_CONSTRAIN_CONFIRM records while adding a key and appends every Constraint::Confirm record to the key's retained constraint vector without a count or memory limit. A process that can connect to the agent socket, including the remote side of a forwarded agent session, can repeatedly add constrained keys and cause renewable memory growth that persists for the process lifetime because keys without a lifetime constraint do not expire. This issue is fixed in version 0.65.0.","state":0,"publishedAt":"2026-10-27T20:14:32.973+00:00","modifiedAt":"2026-10-27T20:14:32.973+00:00","affected":[{"ecosystem":"Vendor product","name":"russh","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eugeny\",\n                    \"product\": \"russh\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.65.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":3.3,"severity":"LOW"}],"references":["https://github.com/Eugeny/russh/security/advisories/GHSA-9wfm-jcj8-jfv9","https://github.com/Eugeny/russh/commit/23aa5d28fe9601c5bdfe9e60b7ec5d4f882c3de6","https://github.com/Eugeny/russh/releases/tag/v0.65.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116696","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116696","identifiers":["CVE-2026-116696"]},"retained":false,"historicalAffected":[]}],"coverage":[]}