Security Bulletin: DataStage on Cloud Pak for Data has several vulnerabilities due to open source software

Summary Open source packages are used as part of the overall processing in DataStage on Cloud Pak for Data. Vulnerability Details CVEID:CVE-2026-2581 DESCRIPTION: This is an uncontrolled resource consumption vulnerability CWE-400 that can lead to Denial of Service DoS. In vulnerable Undici...

Cross-Site Scripting (XSS)

DOMPurify is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to DOMPurify skipping the contents of shadow DOM elements inside HTML elements during sanitization, which allows an attacker to embed malicious payloads that execute when the template is cloned and inserted into the pag...

Cross-site Scripting (XSS)

DOMPurify is vulnerable to cross-site scripting XSS. The vulnerability is due to the use of realm-specific instanceof checks when sanitizing DOM nodes from a different same-origin realm, which allows an attacker to bypass sanitization for form attributes, template content, and shadow DOM, leading...

GHSA-H5JC-78HR-3PC9 Sveltia CMS: Stored XSS in Markdown/RichText preview via unsandboxed same-origin iframe

Impact A stored cross-site scripting XSS vulnerability affected the Markdown/RichText field preview renderer in Sveltia CMS. The DOMPurify sanitization configuration used for Markdown previews explicitly permitted iframe elements without enforcing a sandbox attribute or restricting iframe sources...

CVE-2026-12048

Stored cross-site scripting in pgAdmin 4's error-rendering and plan-node-rendering paths. Text returned by a PostgreSQL server ErrorResponse messages, including object names quoted back inside relation-does-not-exist errors and inside EXPLAIN Recheck Cond / Exact Heap Blocks fields was passed...

CVE-2026-12048

CVE-2026-12048 affects pgAdmin 4 (versions 6.0 up to 9.16). Stored XSS occurs when untrusted server-returned text is passed through html-react-parser in multiple user-facing sinks (toasts, dialogs, explain visualiser, SQL editor prompts, etc.), allowing an attacker-controlled PostgreSQL server to...

CVE-2026-12048 pgAdmin 4: Stored XSS via untrusted error and plan-node text rendered through html-react-parser

Stored cross-site scripting in pgAdmin 4's error-rendering and plan-node-rendering paths. Text returned by a PostgreSQL server ErrorResponse messages, including object names quoted back inside relation-does-not-exist errors and inside EXPLAIN Recheck Cond / Exact Heap Blocks fields was passed...

CVE-2026-12048 pgAdmin 4: Stored XSS via untrusted error and plan-node text rendered through html-react-parser

Stored cross-site scripting in pgAdmin 4's error-rendering and plan-node-rendering paths. Text returned by a PostgreSQL server ErrorResponse messages, including object names quoted back inside relation-does-not-exist errors and inside EXPLAIN Recheck Cond / Exact Heap Blocks fields was passed...

DOMPurify: Permanent `ALLOWED_ATTR` pollution via `setConfig()` bypassing the hook clone-guard (incomplete fix of the 3.4.7 hook-pollution patch)

Summary DOMPurify 3.4.7 shipped a security fix "permanent hook pollution" that makes a registered uponSanitizeAttribute hook's mutation of data.allowedAttributes non-persistent — so allowing an attribute for one element does not leak into later sanitize calls. The fix clones ALLOWEDATTR inside...

Improper Initialization

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Improper Initialization in the DOMPurify.setConfig API when an uponSanitizeAttribute hook is registered that mutates allowedAttributes. An attacker can caus...

GHSA-CMWH-PVXP-8882 DOMPurify: Permanent `ALLOWED_ATTR` pollution via `setConfig()` bypassing the hook clone-guard (incomplete fix of the 3.4.7 hook-pollution patch)

Summary DOMPurify 3.4.7 shipped a security fix "permanent hook pollution" that makes a registered uponSanitizeAttribute hook's mutation of data.allowedAttributes non-persistent — so allowing an attribute for one element does not leak into later sanitize calls. The fix clones ALLOWEDATTR inside...

PT-2026-63984

Name of the Vulnerable Software and Affected Versions DOMPurify versions prior to 3.4.11 Description An issue exists where the software fails to clone the ALLOWED ATTR allowlist when setConfig is used with an uponSanitizeAttribute hook. This allows the hook to permanently mutate the shared...

Open WebUI: Stored XSS in Mermaid Markdown Preview

Summary Open WebUI renders Mermaid blocks from Markdown files in the file preview panel and inserts the generated SVG into the DOM using innerHTML. Because Mermaid is configured with securityLevel: 'loose', attacker-controlled Mermaid content can be rendered unsafely in this flow. A working paylo...

PT-2026-50483

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.6 Description The application renders Mermaid blocks from Markdown files in the file preview panel and inserts the generated SVG into the DOM using innerHTML. Because Mermaid is configured with securityLevel:...

GHSA-VXR8-FQ34-VVX9 DOMPurify: Trusted Types policy survives `clearConfig()` and can poison later `RETURN_TRUSTED_TYPE` output

Impact A DOMPurify instance that is reused across trust boundaries can stay bound to a previously supplied TRUSTEDTYPESPOLICY even after clearConfig is called. A later caller that requests RETURNTRUSTEDTYPE receives a TrustedHTML object created by the old policy, not by a clean default...

Protection Mechanism Failure

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Protection Mechanism Failure through the clearConfig function. An attacker can execute arbitrary scripts in a Trusted Types sink by influencing a previously...

DOMPurify: Trusted Types policy survives `clearConfig()` and can poison later `RETURN_TRUSTED_TYPE` output

Impact A DOMPurify instance that is reused across trust boundaries can stay bound to a previously supplied TRUSTEDTYPESPOLICY even after clearConfig is called. A later caller that requests RETURNTRUSTEDTYPE receives a TrustedHTML object created by the old policy, not by a clean default...

DOMPurify: SAFE_FOR_TEMPLATES bypass - template expressions survive sanitization inside <template> content when using DOM output modes

Summary When DOMPurify is configured with both SAFEFORTEMPLATES: true and RETURNDOM: true or INPLACE: true, an attacker can inject template expressions, such as $evil, evil, or , that survive the sanitization pass inside element content. This bypasses the explicit purpose of SAFEFORTEMPLATES, whi...

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 in the SAFEFORTEMPLATES function. An attacker can inject template expressions that survive sanitization inside element content by...

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 in the INPLACE function when handling a element containing an element with an attached shadow DOM. An attacker can execute arbitrar...