CVE-2026-82462: pac4j pac4j

pac4j-oidc before 6.5.6 Authentication Bypass via Access Token Substitution

CVSS 6.9 MediumEPSS 0.0019 · 9th percentile

Published by the CVE Program (CNA: VulnCheck) at 29 Aug 2026, 16:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
pac4j	pac4j pkg:maven/org.pac4j/pac4j-parent	affected before 6.5.6 semver Other versions: unaffected

Identifiers

CVE-2026-82462

CNA

VulnCheck

Weakness (CWE)

CWE-345

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0019, the 9th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e patch
www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html vendor-advisory
github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-oidc/src/main/java/org/pac4j/oidc/credentials/extractor/OidcCredentialsExtractor.java technical-description
github.com/pac4j/pac4j product
www.vulncheck.com/advisories/pac4j-oidc-before-6.5.6-authentication-bypass-via-access-token-substitution third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.