CVE-2026-82461: fallo de gravedad alta en pac4j
pac4j-oidc before 6.5.6 Privilege Escalation via Unverified Keycloak Access Token
Publicada el · Actualizada el
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.6epss 0.3%
probabilidad de explotación
0.3%top 76% de las CVE
explotación observada
noninguna fuente lo reporta
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.
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
Productos afectados
pac4j · pac4jCVEs relacionadas — pac4j
En el mismo producto, de las más peligrosas a las menos.
CVE-2023-25581CRITICALDeserialization of untrusted data in InternalAttributeHandler in pac4jEPSS 1.9%CVE-2026-82463HIGHpac4j-core before 6.5.6 Authorization Bypass via Reversed Profile Type CheckEPSS 0.6%CVE-2026-82464MEDIUMpac4j-core before 6.5.6 Open Redirect via Backslash LogoutEPSS 0.3%CVE-2026-82465MEDIUMpac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequestEPSS 0.3%CVE-2026-82462MEDIUMpac4j-oidc before 6.5.6 Authentication Bypass via Access Token SubstitutionEPSS 0.2%
Referencias
https://github.com/pac4j/pac4jhttps://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-oidc/src/main/java/org/pac4j/oidc/authorization/generator/KeycloakRolesAuthorizationGenerator.javahttps://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237ehttps://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.htmlhttps://www.vulncheck.com/advisories/pac4j-oidc-before-6.5.6-privilege-escalation-via-unverified-keycloak-access-token