CVE-2025-46656

Name: CVE-2025-46656
Creator: NVD / NIST
Published: 2025-04-26T22:15:17.26+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2025-46656 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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 estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.3/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

0.18%

7.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1284

Affected Software

Vendor	Product	Versions
Matthewwithanm	Markdownify	< 0.14.1

References

Timeline

Published: Apr 26, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is 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.

How severe is CVE-2025-46656?

CVE-2025-46656 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2025-46656?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-46656?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST