Vulnerability advisory

GHSA-vgjm-2cpf-4g7c

Gogs: DOM-based XSS via milestone selection

Published Mar 5, 2026Updated Mar 23, 2026OSV record ↗

Also known as CVE-2026-26276GO-2026-4627

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected versions

gogs.io/gogs Go

All gogs.io/gogs advisories →

Affected	Fixed in
All versions through `0.13.3`	No fix listed

Description

Summary

It was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository’s Milestone name, and when another user selects that Milestone on the New Issue page (/issues/new), a DOM-Based XSS is triggered.

Impact

Theft of information accessible in the victim’s session.
Extraction of CSRF tokens and submission of state-changing requests with the victim’s privileges.
Repository operations performed with the victim’s privileges (Issue operations, settings changes, etc.).

(The impact scope depends on the victim’s permission level.)

Remediation

A fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2