{"id":"CVE-2026-54133","aliases":["GHSA-pcw8-m77r-2528"],"url":"https://o3.security/vulnerability/CVE-2026-54133","summary":"jmespath.php has CompilerRuntime code injection via unescaped function names","details":"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.","published":"2026-06-12T13:56:37.874Z","modified":"2026-08-12T03:51:42.088554531Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"mtdowling/jmespath.php","fixedVersion":"2.9.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54133.json"},{"type":"ADVISORY","url":"https://github.com/jmespath/jmespath.php/security/advisories/GHSA-pcw8-m77r-2528"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54133"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.088554531Z"}}