https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-03T20:31:27.834332+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-40478 CVE-2026-40478 — Improper neutralization of specific syntax patterns for unauthorized expressions in Thymeleaf 2026-10-03T20:31:27.855556+00:00

Affected: thymeleaf, thymeleaf org.thymeleaf:thymeleaf-spring5, thymeleaf org.thymeleaf:thymeleaf-spring6, Red Hat OpenShift Dev Spaces 3.28, Red Hat build of Apache Camel for Spring Boot 4, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7

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 neutralize specific syntax patterns that allow for the execution of unauthorized expressions. If an application developer passes unvalidated user input directly to the template engine, an unauthenticated remote attacker can bypass the library's protections to achieve Server-Side Template Injection (SSTI). This issue has ben fixed in version 3.1.4.RELEASE.

 https://vulnerability.circl.lu/vuln/ghsa-xjw8-8c5c-9r79 GHSA-xjw8-8c5c-9r79 — Improper neutralization of specific syntax patterns for unauthorized expressions in Thymeleaf 2026-10-03T20:31:27.855670+00:00

Affected: Maven: org.thymeleaf:thymeleaf, Maven: org.thymeleaf:thymeleaf-spring5, Maven: org.thymeleaf:thymeleaf-spring6

### Impact A security bypass vulnerability exists in the expression execution mechanisms of Thymeleaf up to and including 3.1.3.RELEASE. Although the library provides mechanisms to prevent expression injection, it fails to properly neutralize specific syntax patterns that allow for the execution of unauthorized expressions. If an application developer passes unvalidated user input directly to the template engine, an unauthenticated remote attacker can bypass the library's protections to achieve Server-Side Template Injection (SSTI).

### Patches This has been fixed in Thymeleaf 3.1.4.RELEASE.

### Workarounds No workaround is available beyond ensuring applications do not pass unvalidated user input directly to the template engine. Upgrading to 3.1.4.RELEASE is strongly recommended in any case.

### Credits Thanks to Dawid Bakaj (VIPentest.com) for responsible disclosure.