CVE-2026-30235
DOM Clobbering via Malicious Links in OpenProject Markdown
Publication date: 2026-03-11
Last updated on: 2026-03-13
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openproject | openproject | to 17.2.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-30235 is a moderate severity vulnerability in OpenProject versions prior to 17.2.0 caused by improper validation in the Markdown rendering, specifically in hyperlink handling.
This flaw allows attackers to inject malicious hyperlink payloads that exploit DOM clobbering, a technique where HTML elements overwrite native DOM functions.
As a result, critical JavaScript calls during application initialization throw runtime errors, causing the entire page to crash or become blank and halting further execution.
How can this vulnerability impact me? :
This vulnerability impacts the availability of the OpenProject application by causing the entire page to crash or become blank.
Because critical JavaScript calls fail during initialization, the application halts further execution, potentially disrupting project management activities.
The vulnerability does not impact confidentiality or integrity, but the denial of service can affect business operations relying on OpenProject.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade OpenProject to version 17.2.0 or later, where the issue with improper Markdown hyperlink validation and DOM clobbering has been fixed.