Answer in brief
CVE-2026-77414 records a Critical severity (CVSS 9.3) vulnerability in JSONata: Arbitrary Code Execution via crafted JSONata expressions. The current sources do not mark it as known exploited. The current feed maps jsonata-js/jsonata (generic), jsonata (npm), jsonata (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps jsonata-js/jsonata (generic), jsonata (npm), jsonata (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| jsonata-js/jsonatageneric | < 1.8.8 || >= 2.0.0, < 2.2.1 | Not reported |
| jsonatanpm | >=2.0.0,<2.2.1 | 2.2.1 |
| jsonatanpm | <1.8.8 | 1.8.8 |
Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.