VDB
CVE-2026-111061
CVE-2026-111061
PUBLISHED
CVSS 4.3 MEDIUM
Reported by GitHub_M · Published October 19, 2026
russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.64.1, the agent server spawns a separate long-lived task for every SSH_AGENT_CONSTRAIN_LIFETIME record in a constrained add-key request. The loop accepts repeated lifetime records, clones the key blob into each task, and does not roll back tasks when later constraint parsing fails. An attacker that can speak the agent protocol locally or through agent forwarding can exhaust memory and tasks until the agent process is starved or terminated, denying SSH agent service. This issue is fixed in version 0.64.1.
Risk Scores
CVSS 3.1
4.3
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Eugeny | russh | < 0.64.1 |
| Eugeny | russh | 0 |
| wolfi | yazi | 0 |
| crates.io | russh | 0 |
| chainguard | yazi | 0 |
Timeline
- Oct 19, 2026 CVE Published
- Oct 19, 2026 Coalition ESS Score
- Oct 19, 2026 CVE Updated
- Oct 20, 2026 EPSS Score
- Oct 21, 2026 EPSS Score
- Oct 24, 2026 EPSS Score
- Oct 25, 2026 EPSS Score
- Oct 29, 2026 EPSS Score
- Oct 30, 2026 Security Advisory
References
- https://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m x_refsource_CONFIRM
- https://github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1 x_refsource_MISC
- https://github.com/Eugeny/russh/releases/tag/v0.64.1 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-111061 advisory
- https://github.com/advisories/GHSA-4wc5-f2rc-q74m advisory