Critical 9.3Published Aug 21, 2026

CVE-2026-77414JSONata: Arbitrary Code Execution via crafted JSONata expressions

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for jsonata-js jsonata

Exploited in the last 30 days

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.

CVSS: 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jsonata-js jsonata jsonata_js:jsonata (from the name)	before 1.8.8; from 2.0.0, < 2.2.1	CNA record

References

References

https://github.com/jsonata-js/jsonata/security/advisories/GHSA-2943-5xfg-gq5f	x-refsource-confirm
https://github.com/jsonata-js/jsonata/pull/799	x-refsource-misc
https://github.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2	x-refsource-misc
https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8	x-refsource-misc
https://github.com/jsonata-js/jsonata/releases/tag/v2.2.1	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.