> CVE-2026-42189 [HIGH]

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PUBLISHED
2026-05-08 20:16
MODIFIED
2026-05-08 20:16
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.48%
Top 58.3%
DATA SOURCES:
NVD đź”— 2026-05-08 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 OSV đź”— 2026-11-02

> DESCRIPTION

Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-770 CWE-789

> CWE DETAILED DESCRIPTIONS

CWE-770: Allocation of Resources Without Limits or Throttling - The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. | CWE-789: Memory Allocation with Excessive Size Value - The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth

AFFECTED PACKAGES:
Unknown / Unknown
138 versions affected
ALIASES:
GHSA-f5v4-2wr6-hqmg

> HISTORIQUE DES MODIFICATIONS

Première apparition
08/05/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-770: Allocation of Resources Without Limits or Throttling - The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the ...
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1
https://github.com/Eugeny/russh/releases/tag/v0.60.1
https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg
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