What is CVE-2026-40458?

CVE-2026-40458 is a medium-severity vulnerability in Pac4j, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2026-04-17.

How severe is CVE-2026-40458?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CSRF in Pac4j

CVE-2026-40458

PAC4J is vulnerable to Cross-Site Request Forgery (CSRF). A malicious attacker can craft a specially designed website which, when visited by a user, will automatically submit a forged cross-site request with a token whose hash collides wit…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Pac4j — versions 5.0, 6.0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

cvd@cert.pl (Third Party Advisory, third-party-advisory)
cvd@cert.pl (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40458?: CVE-2026-40458 is a medium-severity vulnerability in Pac4j, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2026-04-17.
How severe is CVE-2026-40458?: Medium severity. CVSS v3 base score is 6.5 out of 10.