Cross-site scripting in gogs - CVE-2026-26022
Published: April 27, 2026
Vulnerability identifier: #VU128099
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-26022
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: gogs.io
Affected software:
gogs
gogs
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in a victim's browser context.
The vulnerability exists due to improper neutralization of script-related content in internal/markup/sanitizer.go when processing raw HTML links containing data: URIs in issue comments and descriptions. A remote user can inject a crafted link to execute arbitrary JavaScript in a victim's browser context.
User interaction is required, and the victim must click the crafted link.
How to mitigate CVE-2026-26022
Install security update from vendor's website.