The is-my-json-valid package before 2.12.4 for Node.js has an incorrect…
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.
Summary
The is-my-json-valid package before 2.12.4 for Node.js has an incorrect exports['utc-millisec'] regular expression, which allows remote attackers to cause a denial of service (blocked event loop) via a crafted string.
Why it matters now
EPSS 0.01849 79th percentileScored 2026-11-07
Fix Fixed is-my-json-valid (npm): 2.12.4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | is-my-json-valid (npm) | before 2.12.4 | 2.12.4 | Patch available | GHSA-f522-ffg8-j8r6 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- is-my-json-valid (npm) Vendor— Affected before 2.12.4 Fixed in 2.12.4 Patch available GHSA-f522-ffg8-j8r6
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:is_my_json_valid_project:is_my_json_valid:*:*:*:*:*:node.js:*:* | up to 2.12.3 | Vulnerable | Is My Json Valid Project |
- cpe:2.3:a:is_my_json_valid_project:is_my_json_valid:*:*:*:*:*:node.js:*:* Versions up to 2.12.3 Vulnerable ·Is My Json Valid Project
Remediation
- Fix · GHSA-f522-ffg8-j8r6 is-my-json-valid (npm) Fixed in 2.12.4 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2016-2537
- 2026-10-03 Alias added: GHSA-f522-ffg8-j8r6
References
Patch 1
Advisory 2
Other 8
- https://nodesecurity.io/advisories/76
- https://github.com/github/advisory-database/pull/4850
- https://github.com/mafintosh/is-my-json-valid/pull/159
- https://github.com/mafintosh/is-my-json-valid/commit/b3051b277f7caa08cd2edc6f74f50aeda65d2976
- https://hackerone.com/reports/317548
- https://github.com/mafintosh/is-my-json-valid
- https://www.npmjs.com/advisories/572
- https://www.npmjs.com/advisories/76
Sources
- CVE-2016-2537 · CVE Program
- CVE-2016-2537 · NVD
- FIRST EPSS
- GHSA-f522-ffg8-j8r6 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-2537 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences