CVE-2026-128088

2.2 LOW Fix listed Crypto Library

What it is

russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to version 0.65.1, try_sign() captures an Arc<PrivateKey> before awaiting Agent::confirm() and does not revalidate the shared lock state or key presence after the await. This is a distinct residual defect in the remediation for CVE-2026-116794. A peer, including a remote SSH server using agent forwarding, can begin a confirmation-constrained signature request while the agent is unlocked and receive the signature after another connection locks the agent if the stale confirmation returns true. New post-lock requests are rejected and private key material is not disclosed, but the pending operation bypasses the current lock state. This issue is fixed in version 0.65.1.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account, but needs a user to act. Limited direct impact.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-11-13 19:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-11-13 19:19 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: not scored yet.
Severity: 2.2 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-11-13 19:19 UTC
Last modified: 2026-11-13 19:19 UTC
Weakness: CWE-367
Record status: Deferred

Attack profile CVSS 3.1 · 2.2

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Raw vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-128088.md and follow it. Check whether this project is affected by CVE-2026-128088. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record