CVE-2026-82464— pac4j-core before 6.5.6 Open Redirect via Backslash Logout
Quick assessment
Affected
pac4j pac4j
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
pac4j-core 6.5.6 之前版本中的 存在开放重定向漏洞，该漏洞会接受以反斜杠（ ）开头的、符合 的登出重定向目标。攻击者可以构造以反斜杠开头、指向外部主机的登出链接；浏览器会将这些链接规范化为网络路径引用，从而将受害者重定向到攻击者控制的站点。
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I. Basic Information for CVE-2026-82464
Vulnerability Information
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Vulnerability Title
pac4j-core before 6.5.6 Open Redirect via Backslash Logout
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-82464
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-82464 (1)
Vendor Advisories for CVE-2026-82464 (1)
Security Blog Posts for CVE-2026-82464 (1)
Same Patch Batch · pac4j · 2026-08-29 · 5 CVEs total
| CVE-2026-82463 | 8.1 HIGH | pac4j-core before 6.5.6 Authorization Bypass via Reversed Profile Type Check |
| CVE-2026-82461 | 8.1 HIGH | pac4j-oidc before 6.5.6 Privilege Escalation via Unverified Keycloak Access Token |
| CVE-2026-82462 | 6.5 MEDIUM | pac4j-oidc before 6.5.6 Authentication Bypass via Access Token Substitution |
| CVE-2026-82465 | 5.3 MEDIUM | pac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequest |
IV. Related Vulnerabilities
Same product: pac4j
-
CVE-2026-82465
pac4j-saml before 6.5.6 Session Destruction via Unsigned Log -
CVE-2026-82463
pac4j-core before 6.5.6 Authorization Bypass via Reversed Pr -
CVE-2026-82462
pac4j-oidc before 6.5.6 Authentication Bypass via Access Tok -
CVE-2026-82461
pac4j-oidc before 6.5.6 Privilege Escalation via Unverified -
CVE-2026-40459
LDAP Injection in PAC4J
Same vendor: pac4j
-
CVE-2026-82465
pac4j-saml before 6.5.6 Session Destruction via Unsigned Log -
CVE-2026-82463
pac4j-core before 6.5.6 Authorization Bypass via Reversed Pr -
CVE-2026-82462
pac4j-oidc before 6.5.6 Authentication Bypass via Access Tok -
CVE-2026-82461
pac4j-oidc before 6.5.6 Privilege Escalation via Unverified -
CVE-2026-40459
LDAP Injection in PAC4J
Same weakness: CWE-601
-
CVE-2026-82467
Rodauth before 2.47.0 Open Redirect via Return-to Path -
CVE-2026-55834
Pocket ID: Open Redirect on the OIDC /authorize page via unv -
CVE-2026-82274
Twenty Open Redirect via OAuth Propagator Callback -
CVE-2026-59355
Spring Authorization Server: Open Redirect via request_uri p -
CVE-2026-81036
Stalwart Mail Server through 0.16.19 Authorization Code Disc
V. Comments for CVE-2026-82464
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