Vulnerability in Matthewwithanm Markdownify
CVE-2025-46656
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.
EPSS: 0.002 (10.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Matthewwithanm Markdownify
- Python-markdownify — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch)
- cve@mitre.org (Exploit)
Frequently asked questions
- What is CVE-2025-46656?
- CVE-2025-46656 is a low-severity vulnerability in Matthewwithanm Markdownify, classified under Improper Validation of Specified Quantity in Input. CVSS score: 2.9/10. Published 2025-04-26.
- How severe is CVE-2025-46656?
- Low severity. CVSS v3 base score is 2.9 out of 10.
- Is CVE-2025-46656 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.