CVE-2026-102823

Russh is a Rust SSH client and server library. Prior to 0.63.1, client_read_authenticated in russh/src/client/encrypted.rs forwards CHANNEL_DATA, CHANNEL_EXTENDED_DATA, CHANNEL_EOF, CHANNEL_CLOSE, CHANNEL_OPEN_FAILURE, CHANNEL_SUCCESS, CHANNEL_FAILURE, and CHANNEL_REQUEST subtypes exit-status, exit-signal, and xon-xoff to public client::Handler callbacks without confirming that the ChannelId belongs to a channel the client opened and established. A malicious SSH server can send lifecycle events for predicted, unopened, unconfirmed, or released channel identifiers, causing application panics or corrupting command completion and exit-code tracking. This issue is fixed in version 0.63.1.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Eugeny/russh/commit/3430fd26ecafc0dc3705210f5f39a9119fa22774
https://github.com/Eugeny/russh/releases/tag/v0.63.1
https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm
https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm

Configurations

No configuration.

History

02 Oct 2026, 13:17

Type	Values Removed	Values Added
References	~~() https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm -~~	() https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm -

29 Sep 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-29 19:17

Updated : 2026-10-02 13:17

NVD link : CVE-2026-102823

Mitre link : CVE-2026-102823

CVE.ORG link : CVE-2026-102823

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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