Vulnerability in Eugeny Russh
CVE-2026-73430
Russh is a Rust SSH client & server library. Prior to 0.62.4, an unauthenticated SSH client can cause a denial of service by sending SSH_MSG_KEX_ECDH_INIT with a 32-byte all-zero Q_C value. Curve25519Kex::server_dh in russh/src/kex/curve25…
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Eugeny Russh — versions < 0.62.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-73430?
- CVE-2026-73430 is a medium-severity vulnerability in Eugeny Russh, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.3/10. Published 2026-08-12.
- How severe is CVE-2026-73430?
- Medium severity. CVSS v3 base score is 5.3 out of 10.