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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
pac4j pac4j unaffected
Version Status Constraints
0 affected < 6.5.6

No data.

No data.

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Project Subscriptions

Vendors Products
Pac4j Subscribe
Pac4j Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Sat, 29 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
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.
Title pac4j-core before 6.5.6 Authorization Bypass via Reversed Profile Type Check
First Time appeared Pac4j
Pac4j pac4j
Weaknesses CWE-863
CPEs cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*
Vendors & Products Pac4j
Pac4j pac4j
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-29T16:35:26.904Z

Reserved: 2026-08-29T14:11:00.955Z

Link: CVE-2026-82463

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-29T17:17:58.490

Modified: 2026-08-29T17:17:58.490

Link: CVE-2026-82463

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-29T17:30:12Z

Weaknesses