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GHSA-86vw-mfpg-wwv9

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

Source: GitHub Advisory Database (reviewed) High CVE-2026-52746

Packages

EcosystemPackageAffectedFixed in
npm jsonata >= 2.0.0, < 2.2.0 2.2.0
npm jsonata < 1.8.9 1.8.9

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Before JSONata `2.2.0` and `1.8.9`, it is possible to craft non-matching inputs to the [$toMillis](https://docs.jsonata.org/date-time-functions#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.

References

External links from the advisory. They lead to third-party sites.