CVE-2026-82461
Token validation bypass in pac4j-oidc lets attackers forge access tokens and gain roles.
Is CVE-2026-82461 being exploited?
Not confirmed. CVE-2026-82461 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.19% probability of exploitation in the next 30 days.
How severe is CVE-2026-82461?
CVE-2026-82461 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-82461?
Yes. A fix has been recorded for CVE-2026-82461. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-82461 affect?
CVE-2026-82461 affects pac4j-oidc (<6.5.6), pac4j Java library, Applications using pac4j OIDC with Keycloak. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-82461?
Upgrade pac4j-oidc to >=6.5.6 and verify token validation and role extraction.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Forge Keycloak access tokens to obtain admin/client roles and bypass application authorization checks.
Patch when possible
- affected< 6.5.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.