DOMPurify: Prototype Pollution to XSS Bypass via CUSTOM_ELEMENT_HANDLING Fallback

Summary DOMPurify versions 3.0.1 through 3.3.3 latest are vulnerable to a prototype pollution-based XSS bypass. When an application uses DOMPurify.sanitize with the default configuration no CUSTOMELEMENTHANDLING option, a prior prototype pollution gadget can inject permissive tagNameCheck and...

Security Bulletin: IBM Security SOAR is using a component with a known vulnerability (CVE-2025-15599)

Summary IBM Security SOAR uses an older version of the DOMPurify component that may be identified and exploited. Updates for supported versions have been released which address the issue. It is recommended to upgrade to version 51.0.9.2 Vulnerability Details CVEID:CVE-2025-15599 DESCRIPTION:...

PT-2026-34602

Name of the Vulnerable Software and Affected Versions DOMPurify versions 3.0.1 through 3.3.3 Description DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. A prototype pollution-based XSS bypass exists when the DOMPurify.sanitize function is used with the default...

PT-2026-34603

Name of the Vulnerable Software and Affected Versions DOMPurify versions 1.0.10 through 3.3.x Description When the SAFE FOR TEMPLATES configuration is enabled, the software is intended to strip ... expressions from untrusted HTML to prevent cross-site scripting XSS in template-evaluating framewor...

CVE-2026-41240

creationtimestamp| type| source ---|---|--- 2026-04-20 12:41:58+00:00| published-proof-of-concept| https://github.com/cure53/DOMPurify/security/advisories/GHSA-h7mw-gpvr-xq4m...

Cross-site Scripting (XSS)

Overview dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Cross-site Scripting XSS via templates injected to a site in RETURNDOM mode. The SAFEFORTEMPLATES sanitization can be bypassed, which then allows scripts to be executed if...

Cross-site Scripting (XSS)

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Cross-site Scripting XSS via templates injected to a site in RETURNDOM mode. The SAFEFORTEMPLATES sanitization can be bypassed, which then allows scripts to...

Cross-site Scripting (XSS)

Overview dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Cross-site Scripting XSS leading to cross-site scripting, via custom elements. When CUSTOMELEMENTHANDLING is not enabled, and an attacker has already polluted the prototype...

1router (>=0.3.96 <=1.0.2), 9router-custom (=0.3.55) +2166 more potentially affected by CVE-2026-41238 via dompurify (>=3.0.1 <=3.3.3)

dompurify NPM version =3.0.1, =0.3.96, =0.3.33, =0.5.0, =1.0.0, =1.5.1, =0.18.0-beta.0, =0.0.1, =0.1.0-alpha.1, =0.1.0, =0.1.0, =0.0.0-dev-20240828032938, =0.2.8-experimental.0, =1.2.0, =1.5.1 and more Source cves: CVE-2026-41238 Source advisory: SNYK:JS-DOMPURIFY-16132234...

011xwztpjn (=1.0.0), 02y9dg4qm3 (=1.0.0) +11393 more potentially affected by CVE-2026-41239 via dompurify (>=1.0.10 <=3.3.3)

dompurify NPM version =1.0.10, =3.3.3 is affected by a known vulnerability. The following packages have a transitive dependency on dompurify and may be impacted: - 011xwztpjn =1.0.0 - 02y9dg4qm3 =1.0.0 - 04tw75kmd9 =1.0.0 - 0650teqqly =1.0.0 - 097oi25ils =1.0.0 - 0a0fpniotn =1.0.0 - 0c7j76u46q...

Cross-site Scripting (XSS)

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Cross-site Scripting XSS leading to cross-site scripting, via custom elements. When CUSTOMELEMENTHANDLING is not enabled, and an attacker has already pollut...

net.enilink.platform:net.enilink.platform.web (=1.6.0), org.webjars.npm:formio__core (=2.6.0) +1 more potentially affected by CVE-2026-41238 via org.webjars.npm:dompurify (>=3.1.7 <=3.3.0)

org.webjars.npm:dompurify MAVEN version =3.1.7, =0.54.0, =0.55.1 Source cves: CVE-2026-41238 Source advisory: SNYK:JAVA-ORGWEBJARSNPM-16132235...

io.javalin.community.openapi:javalin-redoc-plugin (>=5.0.0 <=5.2.0), io.javalin.community.openapi:openapi-test (>=5.0.0 <=5.0.1) +12 more potentially affected by CVE-2026-41239 via org.webjars.npm:dompurify (>=2.5.8 <=3.3.0)

org.webjars.npm:dompurify MAVEN version =2.5.8, =5.0.0, =5.0.0, =1.96.0, =1.0.0, =1.0.0, =14.3.0, =0.54.0, =2.0.0, =3.1.1, =3.1.3, =3.2.2 - org.webjars.npm:tui-calendar =1.15.3 Source cves: CVE-2026-41239 Source advisory: SNYK:JAVA-ORGWEBJARSNPM-16131136...

Security Bulletin: IBM App Connect Enterprise Certified Container DesignerAuthoriong operands are vulnerable to cross-site scripting (GHSA-h8r8-wccr-v5f2, GHSA-cjmm-f4jc-qw8r) and prototype polution (GHSA-cj63-jhhr-wcxv)

Summary Node.js module dompurify is used by IBM App Connect Enterprise Certified Container. IBM App Connect Enterprise Certified Container DesignerAuthoring operands are vulnerable to cross-site scripting GHSA-h8r8-wccr-v5f2, GHSA-cjmm-f4jc-qw8r and prototype polution GHSA-cj63-jhhr-wcxv. This...

net.enilink.platform:net.enilink.platform.web (=1.6.0), org.webjars.npm:formio__core (=2.6.0) +1 more potentially affected by CVE-2026-41240 via org.webjars.npm:dompurify (>=3.1.7 <=3.3.0)

org.webjars.npm:dompurify MAVEN version =3.1.7, =0.54.0, =0.55.1 Source cves: CVE-2026-41240 Source advisory: SNYK:JAVA-ORGWEBJARSNPM-16078388...

Operator Precedence Logic Error

Overview dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Operator Precedence Logic Error in the form of short-circuit evaluation that gives precedence to ADDTAGS over FORBIDTAGS in sanitizeElements. In an application where ADDTAG...

GHSA-39Q2-94RC-95CP DOMPurify's ADD_TAGS function form bypasses FORBID_TAGS due to short-circuit evaluation

Summary In src/purify.ts:1117-1123, ADDTAGS as a function via EXTRAELEMENTHANDLING.tagCheck bypasses FORBIDTAGS due to short-circuit evaluation. The condition: !tagChecktagName && !ALLOWEDTAGStagName || FORBIDTAGStagName When tagChecktagName returns true, the entire condition is false and the...

DOMPurify's ADD_TAGS function form bypasses FORBID_TAGS due to short-circuit evaluation

Summary In src/purify.ts:1117-1123, ADDTAGS as a function via EXTRAELEMENTHANDLING.tagCheck bypasses FORBIDTAGS due to short-circuit evaluation. The condition: !tagChecktagName && !ALLOWEDTAGStagName || FORBIDTAGStagName When tagChecktagName returns true, the entire condition is false and the...

Operator Precedence Logic Error

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Operator Precedence Logic Error in the form of short-circuit evaluation that gives precedence to ADDTAGS over FORBIDTAGS in sanitizeElements. In an...

1router (>=0.3.96 <=1.0.2), 9router-custom (=0.3.55) +2167 more potentially affected by CVE-2026-41240 via dompurify (>=3.0.0 <=3.3.3)

dompurify NPM version =3.0.0, =0.3.96, =0.3.33, =0.5.0, =1.0.0, =1.5.1, =0.18.0-beta.0, =0.0.1, =0.1.0-alpha.1, =0.1.0, =0.1.0, =0.0.0-dev-20240828032938, =0.2.8-experimental.0, =1.2.0, =1.5.1 and more Source cves: CVE-2026-41240 Source advisory: SNYK:JS-DOMPURIFY-16078387...