Open WebUI has Stored XSS in Banner Component via Improper Sanitization Order

Summary A Stored Cross-Site Scripting XSS vulnerability exists in the Banner component due to an improper sanitization order specifically, DOMPurify is executed before the marked library. This vulnerability allows a compromised or malicious administrator to plant a malicious payload in the global...

GHSA-HCWP-82G6-8WXC Open WebUI has stored XSS via unsanitized Office/Excel/DOCX file preview rendering ({@html} without DOMPurify)

Related advisory This advisory tracks a regression of the original Excel-preview XSS that was publicly disclosed and patched under GHSA-jwf8-pv5p-vhmc patched in v0.8.0. The same root cause — XLSX.utils.sheettohtml output rendered via @html excelHtml without DOMPurify — was reintroduced sometime...

Open WebUI has stored XSS via unsanitized Office/Excel/DOCX file preview rendering ({@html} without DOMPurify)

Related advisory This advisory tracks a regression of the original Excel-preview XSS that was publicly disclosed and patched under GHSA-jwf8-pv5p-vhmc patched in v0.8.0. The same root cause — XLSX.utils.sheettohtml output rendered via @html excelHtml without DOMPurify — was reintroduced sometime...

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...

Security Bulletin: IBM i is Affected By A Cross-Site Scripting Vulnerability in Navigator for i [CVE-2026-0540]

Summary Navigator for IBM i uses the Monaco editor to edit config files. The Monaco editor uses DOMPurify to sanitize the HyperText Markup Language HTML in the editor. DOMPurify is vulnerable to improper neutralization of input by using rawtext elements missing from the SAFEFORXML regex...

Open WebUI has Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order

Vulnerability Details CWE-79: Cross-site Scripting XSS The AccountPending.svelte component renders the admin-configured "Pending User Overlay Content" using marked.parse inside @html with an incorrect DOMPurify application order: Vulnerable Code...

GHSA-FQ3V-XJJX-95RC Open WebUI has Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order

Vulnerability Details CWE-79: Cross-site Scripting XSS The AccountPending.svelte component renders the admin-configured "Pending User Overlay Content" using marked.parse inside @html with an incorrect DOMPurify application order: Vulnerable Code...

GHSA-GF5M-WCRH-7928 open-webui Vulnerable to Stored XSS via Model Description

!IMPORTANT Relationship to CVE-2024-7990 CVE-2024-7990 issued by huntr.dev, March 2025 describes a stored XSS in the same field — the model description — but exploits a different bypass mechanism: a second-order injection through the sanitizeResponseContent function's video-tag placeholder...

Security Bulletin: @carbon/ai-chat is vulnerable to XSS if Object.prototype has been compromised in assistant provided content due to DOMPurify ( CVE-2026-41238 CVE-2026-41239 CVE-2026-41240)

Summary DOMPurify trusts Object.prototype for security-critical config, which violates the principle that a sanitizer should be robust against a hostile global environment. If Object.prototype has been compromised, DOMPurify may not sanitize HTML propertly. Vulnerability Details...

PT-2026-39284

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.0 Description The AccountPending.svelte component renders admin-configured "Pending User Overlay Content" using marked.parse inside @html with an incorrect DOMPurify application order. DOMPurify is applied to t...

Security Bulletin: IBM App Connect Enterprise Certified Container DesignerAuthoring operands are vulnerable to loss of confidentiality, denial of service and cross-site scripting

Summary IBM App Connect Enterprise Certified Container DesignerAuthoring operands are vulnerable to loss of confidentiality CVE-2026-41238, CVE-2026-41239, CVE-2026-41240, GHSA-39q2-94rc-95cp, denial of service CVE-2026-33151, CVE-2026-32288 and cross-site scripting CVE-2026-27142. This bulletin...

Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses dompurify-3.2.4.tgz, dompurify-3.2.6.tgz which is vulnerable to CVE-2025-15599, CVE-2026-0540

Summary IBM Maximo Application Suite - Visual Inspection component uses dompurify-3.2.4.tgz, dompurify-3.2.6.tgz which is vulnerable to CVE-2025-15599, CVE-2026-0540, This bulletin contains information regarding the vulnerability and its remediation. Vulnerability Details CVEID:CVE-2025-15599...

Security Bulletin: There is a vulnerability in dompurify-3.2.4.tgz used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2025-15599, CVE-2026-0540)

Summary There is a vulnerability in dompurify-3.2.4.tgz used by IBM Maximo Manage application in IBM Maximo Application Suite. Vulnerability Details CVEID:CVE-2025-15599 DESCRIPTION: DOMPurify 3.1.3 through 3.2.6 and 2.5.3 through 2.5.8 contain a cross-site scripting vulnerability that allows...

Security Bulletin: IBM Maximo Application Suite - Monitor Component uses dompurify-3.2.7.tgz, dompurify-3.3.0.tgz, dompurify-3.3.1.tgz which is vulnerable to CVE-2026-0540.

Summary IBM Maximo Application Suite - Monitor Component uses dompurify-3.2.7.tgz, dompurify-3.3.0.tgz, dompurify-3.3.1.tgz which is vulnerable to CVE-2026-0540. This bulletin contains information addressing the vulnerability. Vulnerability Details CVEID:CVE-2026-0540 DESCRIPTION: DOMPurify 3.1.3...

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...

Security Bulletin: DevOps Test Performance contains a vulnerability related to use of DOMPurify

Summary Due to use of DOMPurify, DevOps Test Performance and Rational Performance Tester contain a potential Cros-Site Scripting XSS vulnerability. Vulnerability Details CVEID:CVE-2026-41238 DESCRIPTION: DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions...

CVE-2026-41240

A flaw was found in DOMPurify, a DOM-only cross-site scripting sanitizer. A remote attacker could exploit an inconsistency in how forbidden tags and attributes are handled when function-based tag additions are used. This allows malicious HTML, MathML, or SVG elements to bypass sanitization and...

dompurify: DOMPurify: Cross-site scripting vulnerability allows information disclosure

A flaw was found in DOMPurify, a DOM-only cross-site scripting XSS sanitizer. Due to the default allowance of selectedcontent, a remote attacker could craft a malicious payload that, after initial sanitization, could be re-cloned by browsers, leading to the execution of unsanitized markup. This...

CVE-2026-41239

A flaw was found in DOMPurify. A remote attacker could exploit this cross-site scripting XSS vulnerability when DOMPurify is configured to return a Document Object Model DOM or DOM fragment. The SAFEFORTEMPLATES feature, intended to strip template expressions like ..., fails in these modes,...

CVE-2026-41238

A flaw was found in DOMPurify, a software library used to clean potentially malicious code from web content, preventing Cross-Site Scripting XSS attacks. A remote attacker could exploit a vulnerability related to 'prototype pollution' to bypass DOMPurify's security checks. This allows the attacke...