CVE-2026-26276 Gogs: DOM-based XSS via milestone selection
An attacker can execute arbitrary JavaScript in a victim's browser by storing a malicious payload in a repository milestone name, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-26276?
CVE-2026-26276 is a high-severity cross-site scripting vulnerability in gogs, published on 5 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Gogs is an open source self-hosted Git service. Prior to version 0.14.2, 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. This issue has been patched in version 0.14.2.
Weakness: CWE-79
Which versions are affected by CVE-2026-26276?
3 open source packages ship an affected version, including gogs.io/gogs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gogs.io/gogs Go | All versions | None |
gogs.io/gogs Go | All versions to 0.13.3 | None |
gogs.io/gogs Go | All versions to 0.13.3 | None |
Products include Gogs Gogs.
How do I fix CVE-2026-26276?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-26276 being exploited?
There is no known exploitation of CVE-2026-26276 in the wild and no public exploit code.
Other vulnerabilities in gogs
Sources
Also known as GHSA-vgjm-2cpf-4g7c, GO-2026-4627.