CVE-2026-82464pac4j-core before 6.5.6 Open Redirect via Backslash Logout
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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pac4j-core before 6.5.6 contains an open redirect vulnerability in DefaultLogoutLogic.perform() that accepts backslash-prefixed logout redirect targets matching logoutUrlPattern. Attackers can craft logout links with backslash-prefixed external hosts that browsers normalize into network-path references, redirecting victims to attacker-controlled sites after logout.
- CVSS
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-601
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
pac4j pac4j pac4j:pac4j (from the name) | before 6.5.6 | CNA record |
References
- https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237epatch
- https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.htmlvendor-advisory
- https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-core/src/main/java/org/pac4j/core/engine/DefaultLogoutLogic.javatechnical-description
- https://github.com/pac4j/pac4jproduct
- https://www.vulncheck.com/advisories/pac4j-core-before-6.5.6-open-redirect-via-backslash-logoutthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.