CVE-2026-82463

HIGH 8.1

pac4j-core before 6.5.6 Authorization Bypass via Reversed Profile Type Check

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

pac4j-core before 6.5.6 contains an authentication bypass vulnerability in CheckProfileTypeAuthorizer that reverses the profile type validation logic. Attackers can authenticate through a weaker client and access resources requiring a stronger profile type by satisfying generic profile checks.

CWE	CWE-863
Vendor	pac4j
Product	pac4j
Published	Aug 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

pac4j / pac4j

0 < 6.5.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e pac4j.org: https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html github.com: https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-core/src/main/java/org/pac4j/core/authorization/authorizer/CheckProfileTypeAuthorizer.java github.com: https://github.com/pac4j/pac4j vulncheck.com: https://www.vulncheck.com/advisories/pac4j-core-before-6.5.6-authorization-bypass-via-reversed-profile-type-check

Credits

Joshua Rogers (AISLE Research)