JSONata is a JSON query and transformation language. Prior to 2.2.0, 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.
CVE-2026-52746
HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 51% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation1% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 48.8%
- KEV
- Not listed
Published
July 2, 2026
Last Modified
July 23, 2026
Advisory Details (6)
Auto-updated Jul 17, 2026Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
2.2.0 Milestone Release
Patch available: jsonata-js/jsonata v2.2.0
https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0github_commit Patch Available
commit d6ffc17cb16a (jsonata-js/jsonata)
Patch available: jsonata-js/jsonata v2.2.0 (contains commit d6ffc17cb16a)
https://github.com/jsonata-js/jsonata/commit/d6ffc17cb16a8e53c222205bd274624e919cce0bgithub_commit Patch Available
commit 80ba95d170f7 (jsonata-js/jsonata)
Patch available: jsonata-js/jsonata v2.1.1 (contains commit 80ba95d170f7)
https://github.com/jsonata-js/jsonata/commit/80ba95d170f74e3f20f4f36b8b77d8c85cea7686github_pr Patch Available
fix iso8601 regex pattern
Patch available: jsonata-js/jsonata v2.2.0 (PR #793 merged 2026-05-14)
https://github.com/jsonata-js/jsonata/pull/793github_pr Patch Available
fix $toMillis() with more than 3 digit fractional seconds
Patch available: jsonata-js/jsonata v2.1.1 (PR #782 merged 2026-04-30)
https://github.com/jsonata-js/jsonata/pull/782github Patch Available
Malicious inputs to "$toMillis" function can cause resource exhaustion · Advisory · jsonata-js/jsonata · GitHub
https://github.com/jsonata-js/jsonata/security/advisories/GHSA-86vw-mfpg-wwv9Vendor Advisories for CVE-2026-52746(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| jsonata | — | 2.2.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 10× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:19 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:25 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 03:50 UTCEG score recompute
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-02 21:06 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-52746?
CVE-2026-52746 is a high vulnerability published on July 2, 2026. JSONata is a JSON query and transformation language. Prior to 2.2.0, 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…
When was CVE-2026-52746 disclosed?
CVE-2026-52746 was first published in the National Vulnerability Database on July 2, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52746 actively exploited?
CVE-2026-52746 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52746?
CVE-2026-52746 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-52746?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52746, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52746
Is Your Infrastructure Affected by CVE-2026-52746?
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