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VULNERABILITIES

CVE-2026-9793 Details

Description

A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:50846 [email protected]
https://access.redhat.com/errata/RHSA-2026:50847 [email protected]
https://access.redhat.com/errata/RHSA-2026:50848 [email protected]
https://access.redhat.com/errata/RHSA-2026:50849 [email protected]
https://access.redhat.com/security/cve/CVE-2026-9793 [email protected]Vendor Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic Signature[email protected]

Affected Products

ProductVersions
redhat build of keycloak
All versions

CPE

  • cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-9793
NVD Published Date:
May 28, 2026
NVD Last Modified:
Aug 20, 2026
Source:
[email protected]
CVE-2026-9793 Details - Not Deferred