pac4j-core before 6.5.6 contains an authentication bypass vulnerability in CheckProfileTypeAuthorizer that reverses the profile type validation logic. (CVE-2026-82463)
Description
pac4j-core versions before 6.5.6 contain an authentication bypass vulnerability in the CheckProfileTypeAuthorizer component. This flaw reverses the profile type validation logic, allowing attackers to authenticate using a weaker client profile and gain access to resources that require a stronger profile type. The vulnerability has a high severity rating with a CVSS score of 8.1.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in pac4j-core prior to version 6.5.6 involves an authentication bypass in the CheckProfileTypeAuthorizer, where the logic that validates the profile type is reversed. This allows an attacker to satisfy generic profile checks with a weaker client profile and gain unauthorized access to resources that should be restricted to stronger profile types. The issue is classified under CWE-863 (Incorrect Authorization).
Potential Impact
Successful exploitation of this vulnerability can lead to unauthorized access to protected resources by bypassing intended authentication checks. Confidentiality and integrity of sensitive data or functionality may be compromised. There is no indication of availability impact or known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in pac4j-core version 6.5.6. Users should upgrade to version 6.5.6 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f66h-84rm-53q7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-82463"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a944bd9acd9273b49b25bc7
Added to database: 08/30/2026, 15:27:21 UTC
Last enriched: 09/08/2026, 00:53:31 UTC
Last updated: 10/13/2026, 18:48:24 UTC
Views: 95
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