CVE-2026-52746: jsonata · Malicious inputs to "$toMillis" function can cause resource exhaustion
Affects jsonataSource GCVE Database
Not known to be exploited · CVSS 7.5 High : upgrade to 1.8.9 soon.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.8.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 17 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade jsonata to 1.8.9.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmjsonata | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in jsonata versions 2.2.0 and 1.8.9 or later. Applications that evaluate user-provided JSONata expressions should update to these versions as soon as possible to prevent exploitation.
Description
A vulnerability in the jsonata library's $toMillis function allows crafted inputs to cause excessive regex backtracking, leading to denial of service. This affects versions prior to 2.2.0 and 1.8.9. The issue is fixed in jsonata 2.2.0 and 1.8.9. The vulnerability has a high severity score of 7.5 CVSS 3.1 and does not impact confidentiality or integrity but causes availability disruption.
References
- github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9 (opens in a new tab)
- github.com/jsonata-js/jsonata/pull/782 (opens in a new tab)
- github.com/jsonata-js/jsonata/pull/793 (opens in a new tab)
- github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686 (opens in a new tab)
- github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0b (opens in a new tab)
- github.com/jsonata-js/jsonata (opens in a new tab)
- github.com/jsonata-js/jsonata/releases/tag/v2.2.0 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-52746 (opens in a new tab)
- github.com/jsonata-js/jsonata/releases/tag/v1.8.9 (opens in a new tab)