Critical severityNVD Advisory· Published Aug 21, 2026· Updated Sep 9, 2026
CVE-2026-77414
CVE-2026-77414
Description
JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, the src/jsonata.js environment.lookup function used a bypassable hasOwnProperty check. Crafted expressions could use $hasOwnProperty, $spread, $string, prototype access, and $constructor to reach the object prototype and invoke process.getBuiltinModule with child_process, executing arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
jsonatanpm | >= 2.0.0, < 2.2.1 | 2.2.1 |
jsonatanpm | < 1.8.8 | 1.8.8 |
Affected products
1- Range: <1.8.8, <2.2.1
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-2943-5xfg-gq5fghsaADVISORY
- github.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2nvdWEB
- github.com/jsonata-js/jsonata/commit/c41ef185136a7b96ca1049c7745a7503b82193deghsaWEB
- github.com/jsonata-js/jsonata/commit/f09df8416eab8ff44926fc6527c80fb8701de159ghsaWEB
- github.com/jsonata-js/jsonata/pull/799nvdWEB
- github.com/jsonata-js/jsonata/releases/tag/v1.8.8nvdWEB
- github.com/jsonata-js/jsonata/releases/tag/v2.2.1nvdWEB
- github.com/jsonata-js/jsonata/security/advisories/GHSA-2943-5xfg-gq5fnvdWEB
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