PatchSiren cyber security CVE debrief

CVE-2026-46673 Eugeny CVE debrief

Russh is a Rust SSH client & server library. Prior to version 0.60.3, CryptoVec used unchecked capacity growth, unchecked length arithmetic, and unsafe allocation/locking paths. In current russh releases, local SSH agent peers could still feed attacker-controlled frame lengths into buffer growth before validation. In older russh releases before 0.58.0, remote SSH traffic also reached CryptoVec through transport and compression buffers. This issue has been patched in version 0.60.3.

Vendor: Eugeny
Product: russh
CVSS: HIGH 7.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-10
Original CVE updated: 2026-06-11
Advisory published: 2026-06-10
Advisory updated: 2026-06-11

Who should care

Users of Russh library versions prior to 0.60.3

Technical summary

The vulnerability is caused by unchecked capacity growth, unchecked length arithmetic, and unsafe allocation/locking paths in CryptoVec. This issue affects current and older russh releases.

Defensive priority

HIGH

Recommended defensive actions

Update to version 0.60.3 or later

Evidence notes

CVE-2026-46673 has been patched in version 0.60.3.

Official resources

CVE-2026-46673 was published on [cvePublishedAt].