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CVE-2026-82461

HighCVSS 8.6 / 10
Published Aug 29, 2026·Last modified Aug 30, 2026
Affected Components(101)
pac4j/pac4j
pac4j-parent-6.0.0-RC10
pac4j/pac4j
pac4j-parent-6.0.0-RC2
pac4j/pac4j
pac4j-1.8.0-RC1
1 / 34
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.

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Risk Scores
Base Score
8.6

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
6.2

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.32%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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