PatchTheCVECVE-2025-46656: python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as <h9999999> in additi
CVE-2025-46656 is a low-severity flaw (CVSS 2.9) affecting markdownify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 2.9 (Low) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 87%) |
| CISA exploited list | No |
| Weakness | CWE-1284 |
| Published | 2025-04-26 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-46656?
markdownify: upgrade to 0.14.1. Exact commands for each OS are on this page.
Is CVE-2025-46656 being exploited?
CVE-2025-46656 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-46656 affect?
CVE-2025-46656 affects markdownify. Severity is low (CVSS 2.9). 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.
How urgent is CVE-2025-46656?
Priority 18/100. Public exploit reference