CVE-2026-54133Critical· 9.8▾ MidnightA flaw was found in jmespath.php, a library for processing JSON documents in PHP applications. This vulnerability allows a remote attacker to execute arbitrary code by crafting a malicious JMESPath expression. The `JmesPath\CompilerRuntime…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.3%
Last analysed / modified upstream
0.3% → 0.6%
A flaw was found in jmespath.php, a library for processing JSON documents in PHP applications. This vulnerability allows a remote attacker to execute arbitrary code by crafting a malicious JMESPath expression. The JmesPath\CompilerRuntime component fails to properly escape function names, leading to the generation and execution of attacker-controlled PHP code within the application's cache file. This could result in a complete compromise of the affected system.
jmespath.php: jmespath.php has CompilerRuntime code injection via unescaped function names. Released 2026-06-12, updated 2026-09-23.
Not affected:
Refer to the advisory for fix availability.
Affected packages:
mtdowling/jmespath.php < 2.9.1Patched in:
mtdowling/jmespath.php 2.9.1Connected by shared product, vendor, weakness, or advisory.
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