{"apiVersion":"1.0","identifier":"CVE-2026-73430","description":"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/curve25519.rs accepts the all-zero peer public value and computes an all-zero shared secret, after which compute_exchange_hash calls encode_mpint in russh/src/kex/mod.rs and indexes beyond the end of the input while skipping leading zero bytes. The resulting panic occurs before authentication and terminates the server key-exchange task. This issue is fixed in version 0.62.4.","publishedAt":"2026-08-12T21:17:41","lastModifiedAt":"2026-08-13T18:18:17","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73430","cvssScore":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","epssProbability":0.00332,"riskScore":0.55,"affectedProduct":"Russh","affectedVersions":"<0.62.4","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73430","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73430","en":"https://www.redsauce.net/en/cves/CVE-2026-73430","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73430","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73430","de":"https://www.redsauce.net/de/cves/CVE-2026-73430","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73430","el":"https://www.redsauce.net/el/cves/CVE-2026-73430"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73430"}}