mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of…
Priority MEDIUM 48CWE-407Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-407.
Summary
mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of certain digit strings such as 8891110122900e913013935755114.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00156 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| mjson project | mjson | 1.2.7 | — | No fix listed | CNA |
- mjson Vendormjson project Affected 1.2.7 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-30421
- 2026-10-03 Alias added: GHSA-rqfj-9wmv-vpgp
References
More mjson project vulnerabilities
- TI-2023-17339 An issue was discovered mjson thru 1.4.1 allows attackers to cause a denial of service or… CVSS 3.1HIGH 7.5
Sources
- CVE-2023-30421 · CVE Program
- CVE-2023-30421 · NVD
- FIRST EPSS
- GHSA-rqfj-9wmv-vpgp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences