Expression Language Injection Affecting org.thymeleaf:thymeleaf-spring5 package, versions [,3.1.5.RELEASE)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGTHYMELEAF-16419368
- published5 May 2026
- disclosed4 May 2026
- creditCristian-Alexandru STAICU
Introduced: 4 May 2026
NewCVE-2026-41901 (opens in a new tab)How to fix?
Upgrade org.thymeleaf:thymeleaf-spring5 to version 3.1.5.RELEASE or higher.
Overview
Affected versions of this package are vulnerable to Expression Language Injection when dynamically loading classes, which allows server-side template injection that crosses the intended sandbox boundary. An attacker can execute unauthorized expressions with the privileges of the server by injecting malicious input into unsanitized variables used in sandboxed template contexts. This bypasses the isTypeForbidden() check to access StandardTypeLocator directly.