jsonata-js/jsonata · Security
jsonata: Malicious inputs to "$toMillis" function can cause resource exhaustion
- GHSA ID
- GHSA-86vw-mfpg-wwv9
- CVE ID
- CVE-2026-52746
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Impact
Before JSONata 2.2.0 and 1.8.9, it is possible to craft non-matching inputs to the $toMillis function that cause superlinear backtracking in the ISO-8601 validation regex. This may lead to denial of service in applications that evaluate user-provided JSONata expressions.
Patches
This issue has been addressed in JSONata version 2.2.0 or later, and 1.8.9 or later on v1, via fixes that include https://github.com/jsonata-js/jsonata/pull/782 and https://github.com/jsonata-js/jsonata/pull/793. Applications that evaluate user-provided expressions should update ASAP to prevent exploitation.
References
https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9
Credit
Thank you to Doruk Tan Öztürk for disclosing this issue.
CWEs
- CWE-1333 · Inefficient Regular Expression Complexity
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/v2.2.0 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-52746 ↗
- https://github.com/jsonata-js/jsonata/releases/tag/v1.8.9 ↗
- https://github.com/advisories/GHSA-86vw-mfpg-wwv9 ↗