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 expression execution mechanisms. Although the library provides mechanisms to prevent expression injection, it fails to properly restrict the scope of accessible objects, allowing specific potentially sensitive objects to be reached from within a template. 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.
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History
Mon, 20 Apr 2026 15:15:00 +0000
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Thymeleaf
Thymeleaf org.thymeleaf:thymeleaf-spring5 Thymeleaf org.thymeleaf:thymeleaf-spring6 Thymeleaf thymeleaf |
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Thymeleaf
Thymeleaf org.thymeleaf:thymeleaf-spring5 Thymeleaf org.thymeleaf:thymeleaf-spring6 Thymeleaf thymeleaf |
Mon, 20 Apr 2026 14:15:00 +0000
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ssvc
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Fri, 17 Apr 2026 22:15:00 +0000
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| Description | 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 expression execution mechanisms. Although the library provides mechanisms to prevent expression injection, it fails to properly restrict the scope of accessible objects, allowing specific potentially sensitive objects to be reached from within a template. 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. | |
| Title | Improper restriction of the scope of accessible objects in Thymeleaf expressions | |
| Weaknesses | CWE-1336 CWE-917 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-04-20T13:36:06.261Z
Reserved: 2026-04-13T19:50:42.113Z
Link: CVE-2026-40477
Updated: 2026-04-20T13:32:39.391Z
Status : Awaiting Analysis
Published: 2026-04-17T22:16:33.500
Modified: 2026-04-20T19:03:07.607
Link: CVE-2026-40477
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