Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N H N 7.5 .0027 19.1 —
AFFECTED Product Versions Fixed pyjwt < 2.12.0 – —
TIMELINE Mar 12 Reserved by GitHub_M Mar 12 Published (CNA: GitHub_M) Aug 17 EXPLOIT PUBLISHED — CVE-2026-32597 (jpadilla pyjwt). Public exploit reference added.
PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.
| Date | Event | Detail |
|---|---|---|
| March 12, 2026 | Reserved | Reserved by GitHub_M |
| March 12, 2026 | Published | Published (CNA: GitHub_M) |
| August 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-32597 (jpadilla pyjwt). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| jpadilla | pyjwt | — | < 2.12.0 | — |
Authoritative record: CVE-2026-32597 at cve.org
Vendors: jpadilla
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-32597 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.