What is CVE-2026-48525?

CVE-2026-48525 is a medium-severity vulnerability in Jpadilla Pyjwt, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-05-28.

How severe is CVE-2026-48525?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Jpadilla Pyjwt

CVE-2026-48525

PyJWT is a JSON Web Token implementation in Python. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option ("b64": false, RFC 7797), PyJWT performs Base64URL decoding of the compact-serialization payloa…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.001 (17.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Jpadilla Pyjwt — versions >= 2.8.0, < 2.13.0
Pyjwt_project Pyjwt

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

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

Frequently asked questions

What is CVE-2026-48525?: CVE-2026-48525 is a medium-severity vulnerability in Jpadilla Pyjwt, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-05-28.
How severe is CVE-2026-48525?: Medium severity. CVSS v3 base score is 5.3 out of 10.