by Kastro
Paper/Archive/CVE-2026-77414

CVE-2026-77414

jsonata-js jsonata — JSONata: Arbitrary Code Execution via crafted JSONata expressions

EPSS 0.6%public exploitCVSS 9.3
critical.is priorityof 100
47
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 47.2.472 × 209.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
jsonata< 1.8.8–CNA
jsonata>= 2.0.0, < 2.2.1–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/jsonata-js/jsonata/security/advisories/GHSA-2943-5xfg-gq5frefgithub.com/jsonata-js/jsonata/pull/799refgithub.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2refgithub.com/jsonata-js/jsonata/releases/tag/v1.8.8refgithub.com/jsonata-js/jsonata/releases/tag/v2.2.1