jmespath.php has CompilerRuntime code injection via unescaped function names

Date Aug 18, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Composer ยท mtdowling/jmespath.php
CVE CVE-2026-54133
High-risk advisory CVE-2026-54133

Summary

jmespath.php has CompilerRuntime code injection via unescaped function names

Why it matters

GitHub has published a reviewed security advisory for mtdowling/jmespath.php. Prioritize it with other application dependency updates, especially because EPSS places it in the 25% percentile.

Operator check

Check whether mtdowling/jmespath.php is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.3%; percentile: 25%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.