CVE-2025-14046: GitHub Enterprise Server

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21.

Affected products

• GitHub Enterprise Server: before 3.14.21 (fixed in 3.14.21); from 3.15.0, before 3.15.16 (fixed in 3.15.16); from 3.16.0, before 3.16.12 (fixed in 3.16.12); from 3.17.0, before 3.17.9 (fixed in 3.17.9); from 3.18.0, before 3.18.3 (fixed in 3.18.3)

Published 2025-12-11. Last modified 2026-10-07.