PT-2026-55476 · Npm · Jsonata

Published 2026-07-02 · Updated 2026-07-02 · CVE-2026-52746

OSV

CVSS v3.1

7.5

High

Base vector

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

Impact

In JSONata <v2.2.0, 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 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

Credit

Thank you to Doruk Tan Öztürk for disclosing this issue.

Fix

DoS

Weakness Enumeration

CWE-1333

Related Identifiers

CVE-2026-52746

GHSA-86VW-MFPG-WWV9

Affected Products

Jsonata

References · 8

• https://osv.dev/vulnerability/GHSA-86vw-mfpg-wwv9 · Vendor Advisory
• https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686 · Note
• https://github.com/jsonata-js/jsonata/pull/793 · Note
• https://github.com/jsonata-js/jsonata/pull/782 · Note
• https://github.com/jsonata-js/jsonata · Note
• https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0 · Note
• https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9 · Note
• https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b · Note