CVE-2023-30421

Low

Published: 19 April 2025

Published

19 April 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score v3.1 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Score 0.0010 28.1th percentile

Risk Priority 6 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-30421 is a low-severity Inefficient Algorithmic Complexity (CWE-407) vulnerability. Its CVSS base score is 2.9 (Low).

Operationally, ranked at the 28.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

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

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-407

Addresses inefficient algorithms whose complexity can be exploited for DoS.