CVE-2026-41901 Thymeleaf: Improper recognition of unauthorized syntax patterns in sandboxed Thymeleaf expressions

Thymeleaf is a server-side Java template engine for web and standalone environments. Prior to 3.1.5.RELEASE, a security bypass vulnerability exists in the expression execution mechanisms of Thymeleaf. Although the library provides mechanisms to avoid the execution of potentially dangerous...

CVE-2026-40478

CVE-2026-40478 affects the Thymeleaf Java template engine (versions up to 3.1.3.RELEASE). A security bypass allows unauthenticated SSTI by passing unvalidated input to the expression evaluation mechanism; this is fixed in 3.1.4.RELEASE. Connected sources consistently state the root cause as impro...

CVE-2026-40478 Improper neutralization of specific syntax patterns for unauthorized expressions in Thymeleaf

Thymeleaf is a server-side Java template engine for web and standalone environments. Versions 3.1.3.RELEASE and prior contain a security bypass vulnerability in the the expression execution mechanisms. Although the library provides mechanisms to prevent expression injection, it fails to properly...