What is CVE-2026-48522?

CVE-2026-48522 is a medium-severity vulnerability in Jpadilla Pyjwt, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.2/10. Published 2026-05-28.

How severe is CVE-2026-48522?

Medium severity. CVSS v3 base score is 4.2 out of 10.

SSRF in Jpadilla Pyjwt

CVE-2026-48522

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient passes its uri argument directly to urllib.request.urlopen() which uses Python stdlib's default OpenerDirector registering HTTPHandler, HTTPSHandler, FTPHandl…

EPSS: 0.000 (10.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Jpadilla Pyjwt — versions < 2.13.0
Pyjwt_project Pyjwt

Weakness classification (CWE)

CWE-441 — Unintended Proxy or Intermediary (Confused Deputy)
CWE-918 — Server-Side Request Forgery (SSRF)

References

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

Frequently asked questions

What is CVE-2026-48522?: CVE-2026-48522 is a medium-severity vulnerability in Jpadilla Pyjwt, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.2/10. Published 2026-05-28.
How severe is CVE-2026-48522?: Medium severity. CVSS v3 base score is 4.2 out of 10.