PyJWT: PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
High-risk advisory
CVE-2026-102266
Summary
PyJWT: PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
Why it matters
GitHub has published a reviewed security advisory for PyJWT. Prioritize it with other application dependency updates, especially because EPSS places it in the 6% percentile.
Operator check
Check whether PyJWT is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.2%; percentile: 6%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.