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CVE-2026-30838 league/commonmark: DisallowedRawHtml extension bypass via whitespace in HTML tag names

🗓️ 07 Mar 2026 16:00:32Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 37 Views

DisallowedRawHtml bypass via whitespace in tag names in league/commonmark before 2.8.1; fixed in 2.8.1.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-30838
7 Mar 202616:00
attackerkb
circl
Circl
CVE-2026-30838
7 Mar 202615:15
circl
cnnvd
CNNVD
commonmark 跨站脚本漏洞
7 Mar 202600:00
cnnvd
cve
CVE
CVE-2026-30838
7 Mar 202616:00
cve
debiancve
Debian CVE
CVE-2026-30838
7 Mar 202616:00
debiancve
github
Github Security Blog
CommonMark has DisallowedRawHtml extension bypass via whitespace in HTML tag names
6 Mar 202623:27
github
nvd
NVD
CVE-2026-30838
7 Mar 202616:15
nvd
osv
OSV
CLSA-2026-1776731783 TuxCare security update for league/commonmark (1 CVE)
4 Aug 202614:52
osv
osv
OSV
CLSA-2026-1776904648 TuxCare security update for league/commonmark (2 CVEs)
4 Aug 202614:52
osv
osv
OSV
DEBIAN-CVE-2026-30838
7 Mar 202616:15
osv
Rows per page
[
  {
    "vendor": "thephpleague",
    "product": "commonmark",
    "versions": [
      {
        "version": "< 2.8.1",
        "status": "affected"
      }
    ]
  }
]

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