CVE-2026-82461
Last modified
CVE-2026-82461 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| pac4j | pac4j | < 6.5.6 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-82461?
How severe is CVE-2026-82461?
How do I fix CVE-2026-82461?
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-82453rust-iot-platform through commit 5df942ab stores user passwo…7.5
- CVE-2026-82454The Omnivore API (packages/api) before the fix in commit abf…9.1
- CVE-2026-82455RubyGems fails to re-validate path containment after filesys…7.1
- CVE-2026-82456argocd-mcp 0.8.0 binds its HTTP transport to every network i…10
- CVE-2026-82457su-exec through 0.3 fails to validate numeric user and group…7.8
- CVE-2026-82460Cloud Commander before 19.20.2 contains a directory traversa…9.8
- CVE-2026-82462pac4j-oidc before 6.5.6 accepts OIDC callbacks carrying only…6.5
- CVE-2026-82463pac4j-core before 6.5.6 contains an authentication bypass vu…8.1
- CVE-2026-82464pac4j-core before 6.5.6 contains an open redirect vulnerabil…6.1
- CVE-2026-82465pac4j-saml before 6.5.6 does not require signature validatio…5.3
- CVE-2026-82466Rodauth before 2.46.0 contains an authentication bypass vuln…8.7
- CVE-2026-82467Rodauth before 2.47.0 fails to validate protocol-relative re…4.7
Are you affected by CVE-2026-82461?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST