What is CVE-2026-48526?

CVE-2026-48526 is a high-severity vulnerability in Jpadilla Pyjwt, classified under Improper Authentication. CVSS score: 7.4/10. Published 2026-05-28.

How severe is CVE-2026-48526?

High severity. CVSS v3 base score is 7.4 out of 10.

Auth bypass in Jpadilla Pyjwt

CVE-2026-48526

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm…

Vulnerability class: Broken Authentication

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Jpadilla Pyjwt — versions < 2.13.0
Pyjwt_project Pyjwt

Weakness classification (CWE)

CWE-287 — Improper Authentication
CWE-347 — Improper Verification of Cryptographic Signature

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48526?: CVE-2026-48526 is a high-severity vulnerability in Jpadilla Pyjwt, classified under Improper Authentication. CVSS score: 7.4/10. Published 2026-05-28.
How severe is CVE-2026-48526?: High severity. CVSS v3 base score is 7.4 out of 10.