CVE-2018-15801: VMware Spring Framework

High severity, CVSS 7.4. EPSS: 0.7% chance of exploitation in the next 30 days.

Spring Security versions 5.1.x prior to 5.1.2 contain an authorization bypass vulnerability during JWT issuer validation. In order to be impacted, the same private key for an honest issuer and a malicious user must be used when signing JWTs. In that case, a malicious user could fashion signed JWTs with the malicious issuer URL that may be granted for the honest issuer.

Affected products

• VMware Spring Framework: from 5.1.0, before 5.1.2 (fixed in 5.1.2)

Published 2018-12-19. Last modified 2026-06-17.