CVE-2026-116794 russh is a Rust SSH client and server library that includes an SSH agent protocol implementation.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116794?
CVE-2026-116794 is a high-severity vulnerability in Eugeny russh, published on 28 Oct 2026.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-116794?
How do I fix CVE-2026-116794?
No fix has been published for CVE-2026-116794 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116794 being exploited?
There is no known exploitation of CVE-2026-116794 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-116794, GHSA-vp5q-ff62-jwqv.