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VulnerabilityPublished

CVE-2026-116773: Eugeny russh · Unthrottled Resource Allocation

Affects Eugeny russhSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium : upgrade to 0.65.0 when convenient.

Data as of 27 Oct 2026, 20:44 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.65.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade russh and github/Eugeny/russh to 0.65.0.

Affected software

ProductAffectedFixed in
EugenyrusshAffected
  • <0.65.0
Fixed in
  • 0.65.0
crates.iogithub/Eugeny/russhpkg:cargo/github/Eugeny/russhOther threatsAffected
  • <0.65.0
Fixed in
  • 0.65.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade russh to version 0.65.0 or later, where this issue is fixed. No other mitigation is indicated or required.

Description

CVE-2026-116773 is a resource exhaustion vulnerability in the russh Rust SSH client and server library prior to version 0.65.0. The client improperly handles repeated private EXT_INFO messages (msg::EXT_INFO = 7) sent before authentication, appending extension names to a vector without limits or deduplication. This can lead to progressive memory exhaustion on the client side. The issue is fixed in russh version 0.65.0.

References

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