CVE-2026-116802 (GCVE-0-2026-116802)

Vulnerability from cvelistv5 – Published: 2026-10-26 23:05 – Updated: 2026-10-26 23:05
VLAI
Title
DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode
Summary
DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to bypass the SMIL attributeName=href guard when PARSER_MEDIA_TYPE is application/xhtml+xml, because transformCaseFunc does not lowercase attribute names. Attackers can submit SVG with an animate or set element using attributeName="href" and a javascript: entry in values to execute script when users click the sanitized link.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6952 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
cure53 DOMPurify Affected: 0 , < 3.4.17 (semver)
Unaffected: 3.4.17 (semver)
    cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-12 00:00
Credits
Koukyosyumei
Show details on NVD website
To clipboard 

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      "cve": "CVE-2026-116802",
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      "product_status:known_affected": "3",
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      "title": "dompurify: DOMPurify: Cross-site scripting via attribute sanitization bypass in XHTML mode",
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}



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