What’s Vulnerable › Vulnerabilities

CVE-2023-30421

• Severity: low (CVSS 2.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-19 · updated 2026-06-17
• Weakness: CWE-407

Description

mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of certain digit strings such as 8891110122900e913013935755114.

Affected products

• mjson project mjson: 1.2.7

References

• https://github.com/boofish/json_bugs/blob/main/mjson
• https://github.com/cesanta/mjson/releases

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