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VulnerabilityPublished Updated

CVE-2026-52746: jsonata · Malicious inputs to "$toMillis" function can cause resource exhaustion

Affects jsonataSource GCVE Database

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Authoritative record:CVE-2026-52746· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 1.8.9 soon.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
npmjsonataAffected
  • <1.8.9
Fixed in
  • 1.8.9

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

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