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CVE-2026-40478

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

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 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.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

thymeleaf

Vendor
thymeleaf
Product
thymeleaf
Platforms
Unknown
Default status
Unknown
thymeleaf · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
< 3.1.4.RELEASEaffectedUnavailableUnavailableUnavailableNone listed

org.thymeleaf:thymeleaf-spring5

Vendor
thymeleaf
Product
org.thymeleaf:thymeleaf-spring5
Platforms
Unknown
Default status
Unknown
org.thymeleaf:thymeleaf-spring5 · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
< 3.1.4.RELEASEaffectedUnavailableUnavailableUnavailableNone listed

org.thymeleaf:thymeleaf-spring6

Vendor
thymeleaf
Product
org.thymeleaf:thymeleaf-spring6
Platforms
Unknown
Default status
Unknown
org.thymeleaf:thymeleaf-spring6 · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
< 3.1.4.RELEASEaffectedUnavailableUnavailableUnavailableNone listed