Vulnerability in Jsonata
CVE-2026-52746
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.007 (50.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Jsonata
- Jsonata-js Jsonata — versions < 2.2.0, < 1.8.9, >= 2.0.0, < 2.2.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-52746?
- CVE-2026-52746 is a high-severity vulnerability in Jsonata, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2026-07-17.
- How severe is CVE-2026-52746?
- High severity. CVSS v3 base score is 7.5 out of 10.