Vulnerability Description
jmespath.php allows users to use JMESPath, software for declaratively specifying how to extract elements from a JSON document, in PHP applications with PHP data structures. Versions prior to 2.9.1 can generate and execute attacker-controlled PHP code when `JmesPath\CompilerRuntime` is used with an attacker-controlled JMESPath expression. The compiler emits parsed JMESPath function names into generated PHP source without sufficient escaping. A crafted expression can cause the generated cache file to contain executable attacker-controlled PHP, which is then loaded by the compiler runtime. The issue is patched in `2.9.1` and later. As a workaround, disable `JP_PHP_COMPILE` and do not use `JmesPath\CompilerRuntime` with attacker-controlled expressions. Use the default `AstRuntime` for untrusted expressions. Applications that must continue accepting untrusted JMESPath expressions before upgrading should ensure those expressions are never evaluated by the compiler runtime.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jmespath | Jmespath | < 2.9.1 |
Related Weaknesses (CWE)
References
- https://github.com/jmespath/jmespath.php/security/advisories/GHSA-pcw8-m77r-2528MitigationVendor Advisory
- https://github.com/jmespath/jmespath.php/security/advisories/GHSA-pcw8-m77r-2528MitigationVendor Advisory
FAQ
What is CVE-2026-54133?
CVE-2026-54133 is a vulnerability with a CVSS score of 9.8 (CRITICAL). jmespath.php allows users to use JMESPath, software for declaratively specifying how to extract elements from a JSON document, in PHP applications with PHP data structures. Versions prior to 2.9.1 can...
How severe is CVE-2026-54133?
CVE-2026-54133 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-54133?
Check the references section above for vendor advisories and patch information. Affected products include: Jmespath Jmespath.