pac4j-oidc before 6.5.6 fails to verify access token signatures, issuers, audiences, or expiry when extracting Keycloak realm and client roles. Attackers can forge access tokens with administrative roles paired with valid ID tokens to bypass authorization checks in applications relying on pac4j role validation.
Metrics
Affected Vendors & Products
References
History
Mon, 31 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Sat, 29 Aug 2026 16:45:00 +0000
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| Description | pac4j-oidc before 6.5.6 fails to verify access token signatures, issuers, audiences, or expiry when extracting Keycloak realm and client roles. Attackers can forge access tokens with administrative roles paired with valid ID tokens to bypass authorization checks in applications relying on pac4j role validation. | |
| Title | pac4j-oidc before 6.5.6 Privilege Escalation via Unverified Keycloak Access Token | |
| First Time appeared |
Pac4j
Pac4j pac4j |
|
| Weaknesses | CWE-347 | |
| CPEs | cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Pac4j
Pac4j pac4j |
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| References |
|
|
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-29T16:35:25.482Z
Updated: 2026-08-31T18:52:57.662Z
Reserved: 2026-08-29T14:11:00.266Z
Link: CVE-2026-82461
Updated: 2026-08-31T16:23:25.821Z
Status : Received
Published: 2026-08-29T17:17:58.207
Modified: 2026-08-31T19:17:20.150
Link: CVE-2026-82461
No data.