CVE-2026-116802
published 2026-10-27CVE-2026-116802: 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…
medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cure53 | dompurify | < 3.4.17 | 3.4.17 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv4.05.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
Cure53 DOMPurify up to 3.4.16 SMIL Guard transformCaseFunc cross site scripting
vuldb·2026-10-27
CVE-2026-116802 [LOW] Cure53 DOMPurify up to 3.4.16 SMIL Guard transformCaseFunc cross site scripting
A vulnerability was found in Cure53 DOMPurify up to 3.4.16 and classified as problematic. This impacts the function transformCaseFunc of the component SMIL Guard. Executing a manipulation can lead to cross site scripting.
This vulnerability appears as CVE-2026-116802. The attack may be performed from remote. There is no available exploit.
It is suggested to upgrade the affected component.
GHSA
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 transfo
ghsa_unreviewed·2026-10-27
CVE-2026-116802 [MEDIUM] CWE-79 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 transfo
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.
No detection rules found.
No public exploits indexed.
2026-10-27
Published