Security Bulletin: Carbon chart DOMPurify XSS Vulnerabilities (CVE-2026-41238, CVE-2026-41239, CVE-2026-41240)

Summary Three cross-site scripting XSS vulnerabilities CVE-2026-41238, CVE-2026-41239, and CVE-2026-41240 were identified in the DOMPurify library versions 3.0.1 through 3.3.3. These vulnerabilities allow attackers to bypass sanitization through prototype pollution exploitation, template expressi...

Cross-site Scripting (XSS)

DOMPurify is vulnerable to cross-site scripting XSS. The vulnerability is due to SAFEFORTEMPLATES not stripping ... expressions in RETURNDOM or RETURNDOMFRAGMENT modes, which allows an attacker to exploit template-evaluating frameworks like Vue 2 to execute malicious scripts...

CVE-2026-41239

CVE-2026-41239 affects DOMPurify. From v1.0.10 up to but not including v3.4.0, SAFE_FOR_TEMPLATES incorrectly strips mustache/templating expressions in untrusted HTML when RETURN_DOM/RETURN_DOM_FRAGMENT are used, enabling XSS in template-evaluating frameworks (e.g., Vue 2). The issue is triggered...

CVE-2026-41239 DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, SAFEFORTEMPLATES strips ... expressions from untrusted HTML. This works in string mode but not with RETURNDOM or RETURNDOMFRAGMENT, allowing XSS via...

CVE-2026-41239 DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, SAFEFORTEMPLATES strips ... expressions from untrusted HTML. This works in string mode but not with RETURNDOM or RETURNDOMFRAGMENT, allowing XSS via...

GHSA-CRV5-9VWW-Q3G8 DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

Summary | Field | Value | |:------|:------| | Severity | Medium | | Affected | DOMPurify main at 883ac15, introduced in v1.0.10 7fc196db | SAFEFORTEMPLATES strips ... expressions from untrusted HTML. This works in string mode but not with RETURNDOM or RETURNDOMFRAGMENT, allowing XSS via...

DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

Summary | Field | Value | |:------|:------| | Severity | Medium | | Affected | DOMPurify main at 883ac15, introduced in v1.0.10 7fc196db | SAFEFORTEMPLATES strips ... expressions from untrusted HTML. This works in string mode but not with RETURNDOM or RETURNDOMFRAGMENT, allowing XSS via...