CVE-2026-52746
JSONata: Malicious inputs to "$toMillis" function can cause resource exhaustion
- State
- Published
- Severity
- 7.5 High
- Published
- Jul 17, 2026
- Updated
- Aug 3, 2026
- Reserved
- Jun 8, 2026
Description
JSONata is a JSON query and transformation language. Prior to 2.2.0 and 1.8.9, malicious non-matching inputs to the $toMillis function can cause superlinear backtracking in the ISO-8601 validation regex, leading to denial of service in applications that evaluate user-provided JSONata expressions. This issue is fixed in version 2.2.0 and 1.8.9.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-1333 Inefficient Regular Expression Complexity
Affected Products
| Product | Versions |
|---|---|
jsonatajsonata-js |
|
References
- https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9
- https://github.com/jsonata-js/jsonata/pull/782
- https://github.com/jsonata-js/jsonata/pull/793
- https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686
- https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b
- https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9
- https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0
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