---
title: "CVE-2026-102823: Russh - Broken Access Control"
description: "Russh < 0.63.1 contains a broken access control vulnerability caused by client_read_authenticated forwarding channel lifecycle events without verifying channel ownership, letting malicious SSH servers cause panics or corrupt command tracking, exploit requires connection to a malicious SSH server."
url: https://panop.io/threat-heartbeat/CVE-2026-102823/
---

# CVE-2026-102823 Russh - Broken Access Control

Russh < 0.63.1 contains a broken access control vulnerability caused by client\_read\_authenticated forwarding channel lifecycle events without verifying channel ownership, letting malicious SSH servers cause panics or corrupt command tracking, exploit requires connection to a malicious SSH server.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102823)

## Details

Type

Broken Access Control

Impact

Denial Of Service, Data Tampering

CVSS vector

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

Published

29 September 2026

Updated

15 October 2026

Weakness

[CWE-20](https://cwe.mitre.org/data/definitions/20.html)

## Vendor fix

Update to version 0.63.1 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-2026-102823](https://nvd.nist.gov/vuln/detail/CVE-2026-102823)
- [https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm](https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm)
- [https://github.com/Eugeny/russh/commit/3430fd26ecafc0dc3705210f5f39a9119fa22774](https://github.com/Eugeny/russh/commit/3430fd26ecafc0dc3705210f5f39a9119fa22774)
- [https://github.com/Eugeny/russh/releases/tag/v0.63.1](https://github.com/Eugeny/russh/releases/tag/v0.63.1)

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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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