Vulnerability · Published Apr 26, 2025 · Assigned by mitre
CVE-2025-46656
Low 2.9
In plain English
A low-severity security flaw in python-markdownify from python-markdownify. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.9Low
Exploit odds (30 days)0.2%top 87.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | markdownify | 0.14.1 | GHSA-7mpr-5m44-h73r |
| PyPI | markdownify | 0.14.1 | PYSEC-2026-1604 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| python-markdownify | python-markdownify | 0 – before 0.14.1 |
Weakness: CWE-1284 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L