CVE-2026-77413JSONata: Arbitrary Code Execution via crafted JSONata expressions
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No exploitation reported and no EPSS estimate yet.
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JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.0, the src/functions.js lookup function lacked an Object.prototype.hasOwnProperty check and allowed crafted expressions to access inherited prototype members. An attacker able to supply an expression could use inherited prototype setters and getters, constructor access, valueOf, and process.getBuiltinModule to reach the child_process module and execute arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.0.
- 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 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
jsonata-js jsonata jsonata_js:jsonata (from the name) | before 2.2.0 | CNA record |
References
- https://github.com/jsonata-js/jsonata/security/advisories/GHSA-8gq3-vp5j-2grpx-refsource-confirm
- https://github.com/jsonata-js/jsonata/pull/794x-refsource-misc
- https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6ex-refsource-misc
- https://github.com/jsonata-js/jsonata/commit/4c5f4adfb90a9b500889d50f90050ca68888b50dx-refsource-misc
- https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8x-refsource-misc
- https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0x-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.