๐Ÿ›ก๏ธ CVE-2026-2266
๐ŸŸก CVSS 5.4 โ€” Medium โœ… No Known Exploit CWE-79 NVD
5.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed DOM-based cross-site scripting via task list content. The task list content extraction logic did not properly re-encode browser-decoded text nodes before rendering, allowing user-supplied HTML to be injected into the page. An authenticated attacker could craft malicious task list items in issues or pull requests to execute arbitrary scripts in the context of another user's browser session. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.

Details

Severity MEDIUM
CVSS Score 5.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit โœ… No
Source NVD
Published 2026-03-10
Updated 2026-06-02
Modified 2026-03-12
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-server 3.19.0 3.19.3

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