VulnerabilitySecurity Week
8.8 — CRITICAL
Critical GitHub Vulnerability Exposed Millions of Repositories
The remote code execution flaw CVE-2026-3854 was found to impact GitHub.com and GitHub Enterprise Server. The post Critical GitHub Vulnerability Exposed Millions of Repositories appeared first on SecurityWeek.
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A remote code execution flaw (CVE-2026-3854) in GitHub Enterprise Server allowed attackers with push access to execute arbitrary code on the instance, impacting millions of repositories. The vulnerability was identified as an improper neutralization of special elements, allowing user-supplied push option values to be executed without proper sanitization.
⚙️Technical Details
CVEs
CVE-2026-3854
Affected Systems
GitHub Enterprise Server
Attack Vectors
NETWORK
💥Impact Assessment
Severity: CRITICAL
Who Is at Risk
Developers and administrators with push access to GitHub repositories
🛡️Recommended Actions
1Immediately update GitHub Enterprise Server to the latest version
2Disable unneeded repositories and services to reduce attack surface
3Implement strict access controls for repository pushes
📦Affected Products
Github Enterprise Server
🔐NVD Verified DataVERIFIED
CVE-2026-3854 ↗CVSS 8.8 — HIGH
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-77
Affected Products (CPE)
Github Enterprise Server
Read the full article
This is a curated summary. The complete article is available at Security Week.