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📦 npm

GHSA-86vw-mfpg-wwv9

HIGH

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

Also known asCVE-2026-52746
Published
Jul 2, 2026
Updated
Jul 2, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
📦jsonata

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmjsonataall versions2.2.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for jsonata. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update jsonata to 2.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-86vw-mfpg-wwv9 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-86vw-mfpg-wwv9 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-86vw-mfpg-wwv9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Impact In JSONata `<v2.2.0`, 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 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 pr
O3 Security · Impact-Aware SCA

Is GHSA-86vw-mfpg-wwv9 in your dependencies?

O3 detects GHSA-86vw-mfpg-wwv9 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.