# markdown2 (PyPI) vulnerabilities

Source: https://junglewise.ai/threats/technologies/markdown2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/markdown2.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in markdown2 (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2021-26813, was published on 3 March 2021.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 4 (0 critical, 0 exploited in the wild)

## About markdown2 (PyPI)

Python implementation that converts Markdown text to HTML output.

## Latest markdown2 (PyPI) vulnerabilities

- [CVE-2021-26813: markdown2 Regular Expression Denial of Service](https://junglewise.ai/threats/cve-2021-26813-markdown2-regular-expression-denial-of-service) (low, CVSS 3.1, published 3 Mar 2021)
- [CVE-2020-11888: XSS in python-markdown2](https://junglewise.ai/threats/cve-2020-11888-xss-in-python-markdown2) (low, CVSS 3.1, published 20 Apr 2020)
- [CVE-2009-3724: PYSEC-2020-235 - python-markdown2 before 1.0.1.14 has multiple cross-site scripting (XSS) issues.](https://junglewise.ai/threats/cve-2009-3724-cross-site-scripting-in-markdown2-for-python) (low, CVSS 3.1, published 15 Jan 2020)
- [CVE-2018-5773: markdown2 is vulnerable to cross-site scripting](https://junglewise.ai/threats/cve-2018-5773-markdown2-is-vulnerable-to-cross-site-scripting) (low, CVSS 3, published 18 Jan 2018)

## Most severe markdown2 (PyPI) vulnerabilities

- [CVE-2021-26813: markdown2 Regular Expression Denial of Service](https://junglewise.ai/threats/cve-2021-26813-markdown2-regular-expression-denial-of-service) (low, CVSS 3.1, published 3 Mar 2021)
- [CVE-2020-11888: XSS in python-markdown2](https://junglewise.ai/threats/cve-2020-11888-xss-in-python-markdown2) (low, CVSS 3.1, published 20 Apr 2020)
- [CVE-2009-3724: PYSEC-2020-235 - python-markdown2 before 1.0.1.14 has multiple cross-site scripting (XSS) issues.](https://junglewise.ai/threats/cve-2009-3724-cross-site-scripting-in-markdown2-for-python) (low, CVSS 3.1, published 15 Jan 2020)
- [CVE-2018-5773: markdown2 is vulnerable to cross-site scripting](https://junglewise.ai/threats/cve-2018-5773-markdown2-is-vulnerable-to-cross-site-scripting) (low, CVSS 3, published 18 Jan 2018)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other PyPI technologies

- [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities
- [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities
- [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities
- [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities
- [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities
- [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities
- [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities
- [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities
- [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities
- [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities
- [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities
- [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "markdown2 (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/markdown2, 13 November 2026.