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better-auth before 1.6.11 Insecure Cryptographic Defaults via oidcProvider (better-auth better-auth)

CVE-2026-67336
CRITICAL 9.4

En bref

Source
NVD
EPSS
EPSS 0.24 % · centile 15 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
VulnCheck
Statut NVD
Deferred

Rechercher sur…

Description

better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain is used instead of the required S256 method.

Faiblesses (CWE)

  • CWE-327 — Utilisation d'un algorithme cryptographique cassé ou risqué

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 4.0CRITICAL 9.4CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:NVulnCheck
CVSS 3.1HIGH 8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NVulnCheck
CVSS 4.0CRITICAL 9.4CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1HIGH 8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NNVD · disclosure@vulncheck.com (Secondary)

Avis

Références européennes

Produits affectés

ProduitVersions
better-auth · better-authaffected 0 < 1.6.11 ; unaffected 1.6.11

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD