PyPI/pyjwt CVE-2026-48525: medium 5.3, EPSS 0.37%

PyJWT: Unauthenticated DoS via unbounded Base64URL decoding of unused payload segment in b64=false detached JWS

Action: Upgrade pyjwt to 2.13.0 or later.

pip install pyjwt==2.13.0

Affected

Fixed versions

Sources

• osv: GHSA-w7vc-732c-9m39
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-w7vc-732c-9m39
• https://nvd.nist.gov/vuln/detail/CVE-2026-48525
• https://github.com/jpadilla/pyjwt
• https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2026-178.yaml

CVE-2026-48525 · published 2026-06-15T19:29:12Z · modified 2026-09-10T03:50:50.801195449Z · JSON