CVE-2026-105829
League CommonMark 1.3.0 before 2.10.2 Stored XSS via DisallowedRawHtml Bypass
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
League CommonMark from 1.3.0 before 2.10.2 contains a cross-site scripting vulnerability that allows users posting Markdown to bypass the DisallowedRawHtml extension by ending raw HTML with a bare disallowed tag name. Attackers can place a lone <script or <iframe line followed by a block supplying attributes like src or onload, executing stored scripts in viewers' browsers under default GFM settings.
| CWE | CWE-80 |
| Vendor | thephpleague |
| Product | commonmark |
| Published | Oct 8, 2026 |
| Last Updated | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
thephpleague / commonmark
All versions affected References
Credits
🔍 4n86rakam1