Arbitrary Code Injection Affecting jsonata package, versions <1.8.8>=2.0.0 <2.2.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-JSONATA-19233334
- published23 Aug 2026
- disclosed21 Aug 2026
- creditArthur
Introduced: 21 Aug 2026
NewCVE-2026-77415 (opens in a new tab)How to fix?
Upgrade jsonata to version 1.8.8, 2.2.1 or higher.
Overview
jsonata is a JSON query and transformation language
Affected versions of this package are vulnerable to Arbitrary Code Injection via crafted expressions that exploit the evaluateTransformExpression and applyProcedure functions. An attacker can execute arbitrary code by submitting specially crafted JSONata expressions that manipulate internal functions and object prototypes.