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VULNERABILITIES

CVE-2026-82462 Details

Description

pac4j-oidc before 6.5.6 accepts OIDC callbacks carrying only an access token without authorization code or ID token validation. Attackers can substitute access tokens minted for other clients to create authenticated sessions without proper issuer, audience, nonce, or subject verification.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/pac4j/pac4j [email protected]
https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-oidc/src/main/java/org/pac4j/oidc/credentials/extractor/OidcCredentialsExtractor.java [email protected]
https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e [email protected]
https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html [email protected]
https://www.vulncheck.com/advisories/pac4j-oidc-before-6.5.6-authentication-bypass-via-access-token-substitution [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-345Insufficient Verification of Data Authenticity[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-82462
NVD Published Date:
Aug 29, 2026
NVD Last Modified:
Sep 10, 2026
Source:
[email protected]
CVE-2026-82462 Details - Not Deferred