CVE-2026-67336

Published: Ago 01, 2026 Last Modified: Ago 01, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,4
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
HIGH 8,7
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0016
Percentile
0,1th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

327

Use of a Broken or Risky Cryptographic Algorithm

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Accountability Non-Repudiation
Potential Impacts:
Read Application Data Modify Application Data Hide Activities
Applicable Platforms
Languages: Not Language-Specific, Verilog, VHDL
Technologies: Not Technology-Specific, ICS/OT
Likelihood of Exploit: High
View CWE Details
https://github.com/better-auth/better-auth/security/advisor…
https://github.com/better-auth/better-auth/security/advisories/GHSA-9h47-pqcx-h…
https://www.vulncheck.com/advisories/better-auth-before-ins…
https://www.vulncheck.com/advisories/better-auth-before-insecure-cryptographic-…