CVE-2026-105829

6.1 MEDIUMpublic exploit available

Published 2026-10-08 · Updated 2026-10-10

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CWE-80

Public exploit & PoC references

https://github.com/thephpleague/commonmark/security/advisories/GHSA-97jj-33gv-5xf9
https://github.com/thephpleague/commonmark/security/advisories/GHSA-97jj-33gv-5xf9

All references

https://github.com/thephpleague/commonmark/security/advisories/GHSA-97jj-33gv-5xf9
https://www.vulncheck.com/advisories/league-commonmark-1.3.0-before-2.10.2-stored-xss-via-disallowedrawhtml-bypass
https://github.com/thephpleague/commonmark/security/advisories/GHSA-97jj-33gv-5xf9

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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