CVE-2026-52746

Summary

jsonata: Malicious inputs to "$toMillis" function can cause resource exhaustion

Severity

high

CVSS

7.5

EPSS

0.7% (p51)

CWE

CWE-1333

Also known as

GHSA-86vw-mfpg-wwv9

Published

2026-07-02

Updated

2026-07-02

Advisory details

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.

References

• https://github.com/advisories/GHSA-86vw-mfpg-wwv9
• 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

Related advisories

• CVE-2026-77415 — critical · npm/jsonata
• CVE-2026-77414 — critical · npm/jsonata
• CVE-2026-77413 — critical · npm/jsonata
• CVE-2026-52778 — critical · Packagist/yeswiki/yeswiki
• CVE-2026-86081 — high · npm/n8n
• GHSA-j95f-988m-3j2f — high · npm/@tiptap/core
• CVE-2026-83619 — high · npm/@xmldom/xmldom
• CVE-2026-83606 — high · npm/@xmldom/xmldom

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