CVE-2026-121802 — Vulnerability intelligence

better-auth — Better Auth

Published: 2026-11-04T02:36:13.640Z

CVSS

9.1

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version.

Sources

• CVE-2026-121802
• Original advisory
• Original advisory
• Original advisory
• CVE-2026-121802