CVE-2026-121802

CriticalCVSS 9.1/10Last modified Nov 6, 2026

Description

@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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-346

Affected software

Vendor	Product	Versions
better-auth	Better Auth	< 1.7.16

References

Timeline

Published: Nov 4, 2026
Last modified: Nov 6, 2026
NVD status: Deferred

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