CVE-2026-52746
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.7%
50.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-1333
Published 2026-07-17 · modified 2026-08-03
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.
Affected
References
- https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686
- https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b
- https://github.com/jsonata-js/jsonata/pull/782
- https://github.com/jsonata-js/jsonata/pull/793
- https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9
- https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0
- https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9