CVE-2026-26276: Gogs: DOM-based XSS via milestone selection

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-05 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

gogs: before 0.14.2 — fixed in 0.14.2

How to fix

Upgrade to a fixed version: gogs 0.14.2. Check the vendor advisory for mitigations.

References

https://github.com/gogs/gogs/pull/8178
https://github.com/gogs/gogs/releases/tag/v0.14.2
https://github.com/gogs/gogs/security/advisories/GHSA-vgjm-2cpf-4g7c

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