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Vulnerability record · CVE-2026-52746 · published 17 July 2026

CVE-2026-52746: Jsonata inefficient regular expression (redos) vulnerability

Jsonata · Jsonata

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.

7.5 CVSS 3.1 High EPSS 0.69% · top 49.2% CWE-1333 · Inefficient regular expression (ReDoS)
7.5CVSS 3.1 base score
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
3 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686 Patch
https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b Patch
https://github.com/jsonata-js/jsonata/pull/782 Issue TrackingPatch
https://github.com/jsonata-js/jsonata/pull/793 Issue TrackingPatch
https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9
https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 ProductRelease Notes
https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-27307Jsonata prototype pollution vulnerabilityJSONata is a JSON query and transformation language. Starting in version 1.4.0 and prior to version 1.8.7 and 2.0.4, a malicious expression can use t…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2026-52746), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.