CVE-2026-52746CWE-1333

CVE-2026-52746

High · published July 17, 2026

CVSS v3.1

7.5

EPSS

Percentile

52.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 7.5 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00689 · 52.2th percentile
Weakness: CWE-1333 · Inefficient Regular Expression Complexity
Published: 2026-07-17T23:17Z

Affected products (1)

Product	Versions	Fixed in
jsonata/jsonata	< 2.2.0	2.2.0

References (7)

https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686 · [email protected]https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b · [email protected]https://github.com/jsonata-js/jsonata/pull/782 · [email protected]https://github.com/jsonata-js/jsonata/pull/793 · [email protected]https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9 · [email protected]https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 · [email protected]https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9 · [email protected]

EPSS history

Timeline

17 JUL 18:32Z
JSONata: Malicious inputs to "$toMillis" function can cause resource exhaustion
cvelistv5