{"id":"CVE-2026-116794","revision":"db6333f1d98c48b3bbbddb7692520fd3","records":[{"revision":"db6333f1d98c48b3bbbddb7692520fd3","observedAt":"2026-10-28T18:46:48.818+00:00","statement":{"source":"cve-program","id":"CVE-2026-116794","aliases":[],"title":"russh: Agent server never calls `Agent::confirm`, so keys added with the confirm constraint (`ssh-add -c`) sign without confirmation","description":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.50.0-beta.12 until 0.65.0, the agent server's Connection::try_sign path in russh/src/keys/agent/server.rs recognizes SSH_AGENT_CONSTRAIN_CONFIRM but returns a hard-coded successful result instead of calling Agent::confirm. In applications that override Agent::confirm to require user approval or another policy check, a process that can reach the agent socket, including the remote side of a forwarded agent, can use a key added through ssh-add -c without that check and can authenticate or sign data as the user while the key remains loaded. The separate Agent::confirm_request hook still runs for every signing request, so checks implemented there remain effective, and implementations that retain the default always-successful Agent::confirm do not lose an approval check through this regression. This issue is fixed in version 0.65.0.","state":0,"publishedAt":"2026-10-28T17:06:57.542+00:00","modifiedAt":"2026-10-28T17:06:57.542+00:00","affected":[{"ecosystem":"Vendor product","name":"russh","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eugeny\",\n                    \"product\": \"russh\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.65\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N","score":8.3,"severity":"HIGH"}],"references":["https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv","https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826","https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f","https://github.com/Eugeny/russh/releases/tag/v0.65.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116794","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116794","identifiers":["CVE-2026-116794"]},"retained":false,"historicalAffected":[]}],"coverage":[]}