---
title: "CVE-2026-116794: russh - Authentication Bypass"
description: "russh 0.50.0-beta.12 to 0.65.0 contains an authentication bypass caused by ignoring SSH_AGENT_CONSTRAIN_CONFIRM in agent server's Connection::try_sign, letting attackers authenticate without user approval, exploit requires access to the agent socket."
url: https://panop.io/threat-heartbeat/CVE-2026-116794/
---

# CVE-2026-116794 russh - Authentication Bypass

russh 0.50.0-beta.12 to 0.65.0 contains an authentication bypass caused by ignoring SSH\_AGENT\_CONSTRAIN\_CONFIRM in agent server's Connection::try\_sign, letting attackers authenticate without user approval, exploit requires access to the agent socket.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-116794)

## Details

Type

Authentication Bypass

Impact

Privilege Escalation

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to version 0.65.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-116794](https://nvd.nist.gov/vuln/detail/CVE-2026-116794)
- [https://github.com/Eugeny/russh/releases/tag/v0.65.0](https://github.com/Eugeny/russh/releases/tag/v0.65.0)
- [https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv](https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv)
- [https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826](https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826)
- [https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f](https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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