> CVE-2026-81888 [MEDIUM]

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PUBLISHED
2026-08-31 21:17
MODIFIED
2026-08-31 21:17
CVSS_SCORE V3
5.4
EPSS (Prob. Exploit)
0.19%
Top 91.7%
DATA SOURCES:
NVD đź”— 2026-08-31 CWE MITRE đź”— 2026-09-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-09-06

> DESCRIPTION

@hono/oauth-providers is Authentication middleware for Hono. Prior to version 0.8.6, the built-in social login providers accept an OAuth callback even when the `state` value is absent on both sides, so the anti-CSRF check passes for a callback that never came from a genuine login attempt. This defeats the `state`-based CSRF protection under default usage. Version 0.8.6 has a patch.

> 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:R/S:U/C:L/I:L/A:N
EXPLOITABILITY
2.8
IMPACT
2.5

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
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
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-352 CWE-1275

> CWE DETAILED DESCRIPTIONS

CWE-352: Cross-Site Request Forgery (CSRF) - The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. | CWE-1275: Sensitive Cookie with Improper SameSite Attribute - The SameSite attribute for sensitive cookies is not set, or an insecure value is used.

> GITHUB SECURITY ADVISORY

GHSA-fm3f-ch8h-qw8q MODERATE

@hono/oauth-providers: OAuth state check fails open on omitted state, enabling login CSRF and forced account linking

AFFECTED PACKAGES:
NPM / @hono/oauth-providers
< 0.8.6
Fixed in: 0.8.6

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

@hono/oauth-providers: OAuth state check fails open on omitted state, enabling login CSRF and forced account linking

AFFECTED PACKAGES:
Unknown / Unknown
501 versions affected
ALIASES:
GHSA-fm3f-ch8h-qw8q

> HISTORIQUE DES MODIFICATIONS

Première apparition
31/08/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-352: Cross-Site Request Forgery (CSRF) - The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could hav...
Total des modifications: 1 Dernière mise à jour: 1 month ago

> REFERENCES

https://github.com/honojs/middleware/commit/b37765f40b7bddb1d8fce39573b085222dea...
https://github.com/honojs/middleware/pull/2040
https://github.com/honojs/middleware/releases/tag/%40hono%2Foauth-providers%400....
https://github.com/honojs/middleware/security/advisories/GHSA-fm3f-ch8h-qw8q
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