Vulnerability-Lookup

CVE-2026-54133 (GCVE-0-2026-54133)

Vulnerability from cvelistv5 – Published: 2026-06-12 13:56 – Updated: 2026-06-12 15:07

Title

jmespath.php has CompilerRuntime code injection via unescaped function names

Summary

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.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 15:07 UTC

CWE

CWE-20 - Improper Input Validation
CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-116 - Improper Encoding or Escaping of Output

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/jmespath/jmespath.php/security…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
jmespath	jmespath.php	Affected: < 2.9.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54133

Vulnerability from fkie_nvd - Published: 2026-06-12 15:16 - Updated: 2026-06-17 10:58

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/jmespath/jmespath.php/security/advisories/GHSA-pcw8-m77r-2528	Mitigation, Vendor Advisory
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/jmespath/jmespath.php/security/advisories/GHSA-pcw8-m77r-2528	Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	jmespath	jmespath	*

JSON

To clipboard

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GHSA-PCW8-M77R-2528

Vulnerability from github – Published: 2026-08-18 20:16 – Updated: 2026-08-18 20:16

Summary

jmespath.php has CompilerRuntime code injection via unescaped function names

Details

Impact

mtdowling/jmespath.php 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.

A vulnerable flow is:

An application accepts or constructs a JMESPath expression using attacker-controlled input.
The expression is evaluated with JmesPath\CompilerRuntime, or with JmesPath\search() while JP_PHP_COMPILE is enabled.
The crafted expression uses a non-identifier value where the parser accepts a function callee.
The compiler writes that value into generated PHP source without safely escaping it as a PHP string literal.
The generated source is written to the compiled-expression cache directory.
CompilerRuntime loads the generated cache file.
The injected PHP executes in the context of the affected application.

In that flow, an attacker can execute arbitrary PHP code with the privileges of the PHP process. The searched data document is not sufficient to exploit this issue by itself; the attacker must be able to influence the JMESPath expression string.

The default runtime used by JmesPath\search() is AstRuntime, which interprets the parsed expression tree and is not affected unless JP_PHP_COMPILE is enabled. Applications are most likely to be affected when they explicitly instantiate JmesPath\CompilerRuntime, enable JP_PHP_COMPILE as a performance optimization, and allow users to provide JMESPath expressions for filtering, querying, or transforming data.

Patches

The issue is patched in 2.9.1 and later.

Workarounds

If you cannot upgrade immediately, 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.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "mtdowling/jmespath.php"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.9.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54133"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-20",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-18T20:16:38Z",
    "nvd_published_at": "2026-06-12T15:16:31Z",
    "severity": "CRITICAL"
  },
  "details": "## Impact\n\n`mtdowling/jmespath.php` 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.\n\nA vulnerable flow is:\n\n1. An application accepts or constructs a JMESPath expression using attacker-controlled input.\n2. The expression is evaluated with `JmesPath\\CompilerRuntime`, or with `JmesPath\\search()` while `JP_PHP_COMPILE` is enabled.\n3. The crafted expression uses a non-identifier value where the parser accepts a function callee.\n4. The compiler writes that value into generated PHP source without safely escaping it as a PHP string literal.\n5. The generated source is written to the compiled-expression cache directory.\n6. `CompilerRuntime` loads the generated cache file.\n7. The injected PHP executes in the context of the affected application.\n\nIn that flow, an attacker can execute arbitrary PHP code with the privileges of the PHP process. The searched data document is not sufficient to exploit this issue by itself; the attacker must be able to influence the JMESPath expression string.\n\nThe default runtime used by `JmesPath\\search()` is `AstRuntime`, which interprets the parsed expression tree and is not affected unless `JP_PHP_COMPILE` is enabled. Applications are most likely to be affected when they explicitly instantiate `JmesPath\\CompilerRuntime`, enable `JP_PHP_COMPILE` as a performance optimization, and allow users to provide JMESPath expressions for filtering, querying, or transforming data.\n\n## Patches\n\nThe issue is patched in `2.9.1` and later.\n\n## Workarounds\n\nIf you cannot upgrade immediately, 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.",
  "id": "GHSA-pcw8-m77r-2528",
  "modified": "2026-08-18T20:16:38Z",
  "published": "2026-08-18T20:16:38Z",
  "references": [
    {
      "type": "WEB",
      "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"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/mtdowling/jmespath.php/CVE-2026-54133.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jmespath/jmespath.php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "jmespath.php has CompilerRuntime code injection via unescaped function names"
}

Sightings

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Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-54133 (GCVE-0-2026-54133)

FKIE_CVE-2026-54133

GHSA-PCW8-M77R-2528

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