CVE-2026-82463
Received Received - Intake

Authentication Bypass in pac4j-core via CheckProfileTypeAuthorizer

Publication date: 2026-08-29

Last updated on: 2026-08-29

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-08-29
Last Modified
2026-08-29
Generated
2026-08-29
AI Q&A
2026-08-29
EPSS Evaluated
N/A
NVD
CVE-2026-82463
EUVD
EUVD-2026-68120

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
pac4j pac4j-core to 6.5.6 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

pac4j-core before 6.5.6 has an authorization bypass in CheckProfileTypeAuthorizer where profile type validation logic is reversed. Attackers can authenticate via a weaker client and access resources requiring stronger profile types by bypassing stricter checks.

Detection Guidance

To detect this vulnerability, check if your pac4j-core version is below 6.5.6. Run commands like 'mvn dependency:tree' for Maven or 'gradle dependencies' for Gradle to inspect the version. If using a package manager, commands like 'pip show pac4j-core' or 'npm list pac4j-core' may help.

Impact Analysis

Attackers could gain unauthorized access to sensitive resources by exploiting reversed profile type checks. This could lead to data breaches, privilege escalation, or unauthorized actions depending on the application's use of pac4j-core.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR (data protection) and HIPAA (health information privacy) requirements. Compliance may be compromised if unauthorized access results in data exposure or breaches.

Mitigation Strategies

Upgrade pac4j-core to version 6.5.6 or later immediately. Review and update authorization checks in CheckProfileTypeAuthorizer to ensure correct profile type validation logic is applied.

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