What is CVE-2026-30235?

CVE-2026-30235 is a medium-severity vulnerability in Openproject, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-03-11.

How severe is CVE-2026-30235?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Openproject

CVE-2026-30235

OpenProject is an open-source, web-based project management software. Prior to 17.2.0, this vulnerability occurs due to improper validation of OpenProject’s Markdown rendering, specifically in the hyperlink handling. This allows an attacker to inject malicious hyperlink payloads that perform DOM clobbering. DOM clobbering can crash or blank the entire page by overwriting native DOM functions with HTML elements, causing critical JavaScript calls to throw runtime errors during application initialization and halt further execution. This vulnerability is fixed in 17.2.0.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (24.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openproject
Opf Openproject — versions < 17.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-30235?: CVE-2026-30235 is a medium-severity vulnerability in Openproject, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-03-11.
How severe is CVE-2026-30235?: Medium severity. CVSS v3 base score is 6.5 out of 10.