---
id: CVE-2026-82463
title: >-
  pac4j-core before 6.5.6 contains an authentication bypass vulnerability in
  CheckProfileTypeAuthorizer that reverses the profile type validation logic
summary: >-
  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 st…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-863
published: '2026-08-29'
updated: '2026-08-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82463'
references:
  - url: 'https://github.com/pac4j/pac4j'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-core/src/main/java/org/pac4j/core/authorization/authorizer/CheckProfileTypeAuthorizer.java
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e
    label: disclosure@vulncheck.com
  - url: 'https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pac4j-core-before-6.5.6-authorization-bypass-via-reversed-profile-type-check
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-30T12:52:23.555Z'
epss: 0.00551
epssPercentile: 0.43723
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.