CVE-2026-102823
highRussh is a Rust SSH client and server library.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Eugeny/russh/commit/3430fd26ecafc0dc3705210f5f39a9119fa22774 security-advisories@github.com
- https://github.com/Eugeny/russh/releases/tag/v0.63.1 security-advisories@github.com
- https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm security-advisories@github.com
- https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm 134c704f-9b21-4f2e-91b3-4a467353bcc0