CVE-2026-52746: jsonata · ReDoS
Affects jsonataSource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 2.2.0 or 1.8.9 soon.
Data as of 26 Oct 2026, 17:16 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.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-07-17.
- Patch
- Available – fixed in 2.2.0, 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
Weaponised: 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 26 Oct 2026.
What to do
Upgrade jsonata to 2.2.0 or 1.8.9.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| jsonata-jsjsonata | Affected
| Fixed in
|
| jsonata-jsjsonata | Affected
| Fixed in
|
Description
JSONata is a JSON query and transformation language. Prior to 2.2.0 and 1.8.9, malicious non-matching inputs to the $toMillis function can cause superlinear backtracking in the ISO-8601 validation regex, leading to denial of service in applications that evaluate user-provided JSONata expressions. This issue is fixed in version 2.2.0 and 1.8.9.
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/releases/tag/v1.8.9 (opens in a new tab)
- github.com/jsonata-js/jsonata/releases/tag/v2.2.0 (opens in a new tab)