CVE-2026-55790
Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget
Description
Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s "Give feedback" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.
INFO
Published Date :
July 1, 2026, 10:57 p.m.
Last Modified :
July 1, 2026, 10:57 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-55790
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Craft CMS to version 4.17.16 or later.
- Update Craft CMS to version 5.9.23 or later.
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CVE-2026-55790 vulnerability anywhere in the article.