PyPI/pyjwt CVE-2026-48523: medium 5.4, EPSS 0.17%

PyJWT: Algorithm allow-list bypass when decoding with `PyJWK` / `PyJWKClient` keys

Action: Upgrade pyjwt to 2.13.0 or later.

pip install pyjwt==2.13.0

Affected

Fixed versions

Sources

• osv: GHSA-jq35-7prp-9v3f
• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-jq35-7prp-9v3f
• https://nvd.nist.gov/vuln/detail/CVE-2026-48523
• https://github.com/jpadilla/pyjwt
• https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2026-176.yaml

CVE-2026-48523 · published 2026-06-15T19:27:48Z · modified 2026-09-10T03:51:08.776007275Z · JSON