Cyber Resilience

CVE-2025-46656

LowPublic PoC

Published: 26 April 2025

Published
26 April 2025
Modified
16 October 2025
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 0.0011 28.1th percentile
Risk Priority 6 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-46656 is a low-severity Improper Validation of Specified Quantity in Input (CWE-1284) vulnerability in Matthewwithanm Markdownify. 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; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as <h9999999> in addition to <h1> through <h6>. This causes memory consumption.

CWE(s)
CWE-1284

Related Threats

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

Affected Assets

matthewwithanm
markdownify
≤ 0.14.1

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References