CVE-2026-52746: JSONata is a JSON query and transformation language

Q: How do I fix CVE-2026-52746?

jsonata: upgrade to 2.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-52746 being exploited?

CVE-2026-52746 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-52746 affect?

CVE-2026-52746 affects jsonata. Severity is high (CVSS 7.5). 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 appl

Q: How urgent is CVE-2026-52746?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-52746 is a high-severity flaw (CVSS 7.5) affecting jsonata. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-1333
Published	2026-07-17
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: jsonata

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-17 19:17 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

jsonata jsonata UPGRADE

Affected: < 2.2.0

Fixed in: 2.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jsonata || rpm -q jsonata || jsonata --version

2. UPGRADE to 2.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jsonata

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jsonata

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-52746?

jsonata: upgrade to 2.2.0. Exact commands for each OS are on this page.

Is CVE-2026-52746 being exploited?

CVE-2026-52746 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-52746 affect?

CVE-2026-52746 affects jsonata. Severity is high (CVSS 7.5). 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 appl

How urgent is CVE-2026-52746?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs