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Advisory record · GHSA-9wfm-jcj8-jfv9

russh's SSH agent server is susceptible to unbound allocations via repeated SSH_AGENT_CONSTRAIN_CONFIRM messages

CVSS 3.3 LowEPSS 0.0011 · 1st percentile

Published by the GitHub Advisory Database at 30 Oct 2026, 22:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
russhcrates.io<0.65.00.65.0
Identifiers
GHSA-9wfm-jcj8-jfv9 · CVE-2026-116696
Weakness (CWE)
CWE-770
Tags
Published
30 Oct 2026
Updated
30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

russh versions before 0.65.0 have an SSH agent server that keeps an unbounded number of constraint records for each added key. Any process that can reach the agent socket, including a remote process via agent forwarding, can make the agent's memory grow without bound. Upgrade russh to 0.65.0 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
3.3 Low 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0011, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Oct 2026, 20:14 UTC Confirmed by the CVE List
  2. 27 Oct 2026, 21:18 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:24 UTC First seen by agentprime
  4. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.