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CVE-2026-11800: Improper Verification of Cryptographic Signature

🗓️ 25 Jun 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauth...

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15 Jul 2026 00:00Current
CVSS 3.18.1
EPSS0.003
SSVC
0