PyJWT: Malformed RSA JWK aborts parsing of an entire JWK Set — GHSA-W6J9-CWV2-H6WQ

Summary

## Summary A malformed RSA JWK inside a JWK Set aborts parsing of the entire set instead of being skipped, because `RSAAlgorithm.from_jwk` can raise a plain `ValueError` that isn't caught by `PyJWKSet`'s per-key error-skipping logic. ## Affected component / version - Package: `PyJWT` (PyPI, ecosystem `pip`) - Files: `jwt/api_jwk.py` (`PyJWK.__init__`, `PyJWKSet.__init__`), `jwt/algorithms.py`…

Timeline

Published by source

2026-09-29

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 5.9 out of 10.
• Review exposure for the affected product or family: pip: PyJWT.

Product

pip: PyJWT

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-W6J9-CWV2-H6WQ

Source

GitHub

Vendor

GitHub

Published by source

2026-09-29

Last source activity

2026-09-29

Additional identifiers

CVE-2026-102274

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.