CVE-2026-28490

Broken Keys: Critical Authlib Flaws Expose Millions to JWT Forgery and Padding Oracles

Broken Keys: Critical Authlib Flaws Expose Millions to JWT Forgery and Padding Oracles

Do Son March 17, 2026

Three critical flaws in Authlib (including CVSS 9.1 CVE-2026-27962) allow JWT forgery and padding oracle attacks. Update to version 1.6.9 immediately.

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