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CVE-2026-65914— DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization

Quick assessment

Affected
cure53 DOMPurify
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cure53 DOMPurify是Cure53公司开源的一款使用JavaScript编写的,用于HTML、MathML和SVG的DOM(文档对象模型)。 Cure53 DOMPurify 3.3.2之前版本存在跨站脚本漏洞，该漏洞源于经清理后的HTML使用innerHTML重新插入带有script、xmp、iframe、noembed、noframes或noscript包装器的特殊解析环境时存在突变型跨站脚本漏洞，攻击者可构造带有结束序列的有效载荷，在重新解析期间突破包装器环境，通过事件处理程序重新激活危

CVSS 5.3 · Medium EPSS 0.31% · P24

Affected Version Matrix 2

VendorProduct Version RangeStatus
cure53 DOMPurify < 3.3.2 affected
3.3.2 unaffected
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I. Basic Information for CVE-2026-65914

Vulnerability Information
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Vulnerability Title
DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization
Source: CVE Program / CVE List V5
Vulnerability Description
DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Cure53 DOMPurify 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cure53 DOMPurify是Cure53公司开源的一款使用JavaScript编写的,用于HTML、MathML和SVG的DOM(文档对象模型)。 Cure53 DOMPurify 3.3.2之前版本存在跨站脚本漏洞，该漏洞源于经清理后的HTML使用innerHTML重新插入带有script、xmp、iframe、noembed、noframes或noscript包装器的特殊解析环境时存在突变型跨站脚本漏洞，攻击者可构造带有结束序列的有效载荷，在重新解析期间突破包装器环境，通过事件处理程序重新激活危
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cure53 DOMPurify 0 ~ 3.3.2 -

II. Public POCs for CVE-2026-65914

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III. Intelligence Information for CVE-2026-65914

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Vendor Advisories for CVE-2026-65914 (2)

Same Patch Batch · cure53 · 2026-07-23 · 11 CVEs total

CVE-2026-65898 7.2 HIGH DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig
CVE-2026-65899 6.1 MEDIUM DOMPurify before 3.4.9 Trusted Types Policy State Contamination
CVE-2026-65901 6.1 MEDIUM DOMPurify 3.4.6 Cross-Site Scripting via IN_PLACE nodeName
CVE-2026-65900 6.1 MEDIUM DOMPurify before 3.4.8 Template Expression Injection via RETURN_DOM
CVE-2026-65912 6.1 MEDIUM DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR
CVE-2026-65913 6.1 MEDIUM DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES
CVE-2026-65911 6.1 MEDIUM DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage
CVE-2026-65903 6.1 MEDIUM DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS
CVE-2026-65902 6.1 MEDIUM DOMPurify before 3.4.7 Hook Mutation Pollution via allowedTags
CVE-2026-65904 4.7 MEDIUM DOMPurify through 3.3.3 Cross-Site Scripting via IN_PLACE mode

IV. Related Vulnerabilities

Same product: DOMPurify
Same vendor: cure53
Same weakness: CWE-79