CVE-2026-121802

CVSS 9.1 (critical) · published 2026-11-04

@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.

Weakness: CWE-346

Source: NVD CVE-2026-121802

References

• https://github.com/better-auth/better-auth/blob/main/packages/expo/CHANGELOG.md
• https://github.com/better-auth/better-auth/releases/tag/v1.7.16
• https://github.com/better-auth/better-auth/security/advisories/GHSA-4wq4-2ppv-q3hg

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