CVE-2026-77413CWE-94code-injection

CVE-2026-77413

published August 22, 2026

CVSS
9.3
EPSS
1%
Percentile
53.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.3 · NONE
CVSS v4.0
9.3 · 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
EPSS
0.00719 · 53.3th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-08-22T01:17Z
References (7)
https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6e · [email protected]https://github.com/jsonata-js/jsonata/commit/4c5f4adfb90a9b500889d50f90050ca68888b50d · [email protected]https://github.com/jsonata-js/jsonata/pull/794 · [email protected]https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8 · [email protected]https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 · [email protected]https://github.com/jsonata-js/jsonata/security/advisories/GHSA-8gq3-vp5j-2grp · [email protected]https://github.com/jsonata-js/jsonata/security/advisories/GHSA-8gq3-vp5j-2grp · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 21 AUG 20:47Z
    JSONata: Arbitrary Code Execution via crafted JSONata expressions
    cvelistv5