{"affected":[{"product":"russh","source":"CNA: GitHub_M","vendor":"Eugeny","versions":[{"status":"affected","version":"< 0.65"}]},{"defaultStatus":"unaffected","ecosystem":"crates.io","packageName":"russh","product":"russh","source":"OSV GHSA-vp5q-ff62-jwqv","vendor":"","versions":[{"events":[{"introduced":"0"},{"fixed":"0.65"}],"status":"unknown","version":"0","versionType":"ECOSYSTEM"}]}],"cveId":"CVE-2026-116794","cwes":["CWE-862"],"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.","epss":{"date":"2026-11-02","percentile":0.04727,"score":0.00156},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv"}],"kev":null,"metrics":[{"score":8.3,"severity":"high","source":"CNA: GitHub_M","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","version":"4.0"}],"modifiedAt":1793711320870,"publishedAt":1793207217542,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/releases/tag/v0.65.0"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv"},{"source":"OSV / GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/advisories/GHSA-vp5q-ff62-jwqv"},{"source":"OSV / GitHub Security Advisories","tags":["osv"],"url":"https://osv.dev/vulnerability/GHSA-vp5q-ff62-jwqv"}],"remediation":[{"kind":"fix","source":"OSV GHSA-vp5q-ff62-jwqv","text":"russh (crates.io): OSV reports a fixed version 0.65. Check the advisory for supported release branches.","url":"https://github.com/advisories/GHSA-vp5q-ff62-jwqv"}],"revision":"20fe7958c2be0671ed2512ddaef57864a98ba67dd3d0d708638733aae0313547","sources":[{"modifiedAt":1793711320870,"name":"CNA: GitHub_M","retrievedAt":1793714932484,"url":"https://www.cve.org/CVERecord?id=CVE-2026-116794"},{"modifiedAt":1793402108280,"name":"OSV / GitHub Security Advisories","retrievedAt":1793714933093,"url":"https://osv.dev/vulnerability/GHSA-vp5q-ff62-jwqv"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793714932963,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-116794"}],"ssvc":{"assessedAt":1793711294117,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"russh: Agent server never calls `Agent::confirm`, so keys added with the confirm constraint (`ssh-add -c`) sign without confirmation","updatedAt":1793714933093}