CVE-2025-3757: Openpubkey

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.

Affected products

• Openpubkey Openpubkey: before 0.10.0 (fixed in 0.10.0)

Published 2025-05-13. Last modified 2026-06-17.