Is authlib affected by CVE-2025-61920?

PyPI authlib is affected in <1.6.5.

Is CVE-2025-61920 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

high

CVE-2025-61920

Q: Is CVE-2025-61920 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

PyPI · authlib

Summary

Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Severity: high
EPSS: 0.6% (p43)
Also known as: GHSA-pq5p-34cr-23v9
Published: 2025-10-10

References

https://github.com/authlib/authlib/security/advisories/GHSA-pq5p-34cr-23v9
https://nvd.nist.gov/vuln/detail/CVE-2025-61920
https://github.com/authlib/authlib/commit/867e3f87b072347a1ae9cf6983cc8bbf88447e5e

Related advisories

CVE-2026-27962 — critical · PyPI/authlib
CVE-2026-28498 — high · PyPI/authlib
CVE-2026-28490 — high · PyPI/authlib
CVE-2026-28802 — high · PyPI/authlib
CVE-2025-59420 — high · PyPI/authlib
CVE-2026-41479 — medium · PyPI/authlib
CVE-2026-44681 — medium · PyPI/authlib
CVE-2026-41425 — medium · PyPI/authlib

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.