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CVE-2026-40477: Thymeleaf Ssti Incomplete Expression Recognizercve-2026-40477-thymeleaf-ssti-incomplete-expression-recognizer

Detected an under-specified Thymeleaf expression-opener recognizer that checks only '$', '*', '#', '@', '~' but does NOT also check the preprocessing opener '_' (for "__...__") nor the literal-substitution opener '|' (for "|...|"). This is the CVE-2026-40477 (Thymeleaf <= 3.1.3.RELEASE) SSTI-bypass shape: SpringRequestUtils.containsExpression() fails to flag

JavaSpringCVE-2026-40477GHSA-R4V4-5MWR-2FWRCWE-1336CWE-917
by Provallyupdated 2026-06-12Apache-2.0
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