Technology · Packagist
league/commonmark (Packagist) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 18 vulnerabilities in league/commonmark (Packagist): 0 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, league/commonmark DisallowedRawHtml XSS bypass in tag parsing, was published on 30 September 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before.
- Last 7 days
- 0
- Last 90 days
- 7
- Critical, all time
- 0
- Exploited in the wild
- 0
About league/commonmark (Packagist)
A PHP Markdown parser for the CommonMark specification.
Latest league/commonmark (Packagist) vulnerabilities
- league/commonmark DisallowedRawHtml XSS bypass in tag parsingmediumCVSS 6.1
- league/commonmark quadratic DoS in GitHub Flavored Markdown table parserhighCVSS 7.5
- CVE-2024-58382: league/commonmark polynomial time complexity denial of servicehighCVSS 7.5EPSS 0.3%
- CVE-2026-86431: league/commonmark AttributesExtension XSS bypass with U+000ChighCVSS 7.2EPSS 0.4%
- CVE-2026-86430: league/commonmark denial of service in parsinghighCVSS 7.5EPSS 0.5%
- CVE-2026-86429: League CommonMark quadratic parsing complexity denial of servicehighCVSS 7.5EPSS 0.5%
- CVE-2026-86428: commonmark denial of service in AttributesExtensionhighCVSS 7.5EPSS 0.5%
- CVE-2026-71488: league commonmark quadratic-time denial of service in Markdown parsinghighCVSS 7.5EPSS 0.6%
- CVE-2026-71478: thephpleague commonmark XSS bypass in AttributesExtensionmediumCVSS 6.1EPSS 0.4%
- thephpleague commonmark denial of service in XmlRenderermediumCVSS 5.3
- thephpleague commonmark denial of service in UniqueSlugNormalizerhighCVSS 7.5
- league commonmark denial of service in Footnote extensionhighCVSS 7.5
- league/commonmark denial of service in AttributesExtensionhighCVSS 7.5
- CVE-2026-33347: league/commonmark has an embed extension allowed_domains bypassmediumCVSS 4EPSS 0.3%
- CVE-2026-30838: CommonMark has DisallowedRawHtml extension bypass via whitespace in HTML tag namesmediumCVSS 4EPSS 0.2%
- CVE-2025-46734: league/commonmark XSS in Attributes extensionmediumCVSS 6.4EPSS 0.4%
- CVE-2018-20583: PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)lowCVSS 3EPSS 1.6%
- CVE-2019-10010: Moderate severity vulnerability that affects league/commonmarklowCVSS 3EPSS 1.1%
Most severe league/commonmark (Packagist) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-71488: league commonmark quadratic-time denial of service in Markdown parsinghighCVSS 7.5EPSS 0.6%
- CVE-2026-86429: League CommonMark quadratic parsing complexity denial of servicehighCVSS 7.5EPSS 0.5%
- CVE-2026-86430: league/commonmark denial of service in parsinghighCVSS 7.5EPSS 0.5%
- CVE-2026-86428: commonmark denial of service in AttributesExtensionhighCVSS 7.5EPSS 0.5%
- CVE-2024-58382: league/commonmark polynomial time complexity denial of servicehighCVSS 7.5EPSS 0.3%
- league/commonmark quadratic DoS in GitHub Flavored Markdown table parserhighCVSS 7.5
- thephpleague commonmark denial of service in UniqueSlugNormalizerhighCVSS 7.5
- league commonmark denial of service in Footnote extensionhighCVSS 7.5
- league/commonmark denial of service in AttributesExtensionhighCVSS 7.5
- CVE-2026-86431: league/commonmark AttributesExtension XSS bypass with U+000ChighCVSS 7.2EPSS 0.4%
Vulnerabilities per week
Nothing in the last four weeks, down from 2 vulnerabilities in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 5 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 2 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many league/commonmark (Packagist) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/league-commonmark)<a href="https://junglewise.ai/threats/technologies/league-commonmark"><img src="https://junglewise.ai/threats/technologies/league-commonmark/badge.svg" alt="league/commonmark (Packagist) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/league-commonmark.json, and this page as text at https://junglewise.ai/threats/technologies/league-commonmark.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "league/commonmark (Packagist) vulnerabilities", https://junglewise.ai/threats/technologies/league-commonmark, 9 November 2026.