CVE-2026-6736

CVE-2026-6736 describes an authentication bypass in GitHub Enterprise Server (GHES) : when external authentication is enabled, the signup endpoint could create a local user account and establish a session without validating the external identity provider. This unauthenticated access required netw...

CVE-2026-6736 Authentication bypass vulnerability in GitHub Enterprise Server allowed creation of local user accounts bypassing the configured external identity provider

An authentication bypass vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to create a local user account, bypassing the configured external identity provider. When external authentication was enabled, the signup endpoint did not properly enforce th...

PT-2026-38593

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description An unauthenticated attacker can cause service disruption by sending crafted requests containing deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parses...

GitHub Enterprise Server security vulnerabilities

GitHub Enterprise Server is an open-source application developed by GitHub in the United States. It provides a scalable and easy-to-manage platform by allowing users to set their GitHub instances as virtual devices. Prior to version 3.21 of GitHub Enterprise Server, there was a security...

PT-2026-38588

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description An authentication bypass allows an unauthenticated attacker to create a local user account, bypassing the configured external identity provider. When external authentication is enable...

PT-2026-38594

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description A server-side request forgery SSRF issue exists in the notebook viewer. This occurs due to URL parser confusion between the validation layer and the HTTP request library, where the...

GitHub Enterprise Server security vulnerabilities

GitHub Enterprise Server is an open-source application developed by GitHub in the United States. It provides a scalable and easy-to-manage platform by allowing users to set their GitHub instances as virtual devices. Prior to version 3.21 of GitHub Enterprise Server, there was a security...

CVE-2026-8106: Improper Neutralization of Input During Web Page Generation

A reflected HTML injection vulnerability was identified in the GitHub Enterprise Server Management Console login page that could allow credential theft. The redirectto query parameter on the /setup/unlock endpoint was reflected into an HTML attribute without proper sanitization, enabling an...

CVE-2026-7541: Allocation of Resources Without Limits or Throttling

A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause service disruption by sending crafted requests with deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parsed user-controlled JSON request bodie...

CVE-2026-6736: Missing Authentication for Critical Function

An authentication bypass vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to create a local user account, bypassing the configured external identity provider. When external authentication was enabled, the signup endpoint did not properly enforce th...

CVE-2026-8034: Server-Side Request Forgery (SSRF)

A server-side request forgery SSRF vulnerability was identified in the GitHub Enterprise Server notebook viewer that allowed an attacker to access internal services by exploiting URL parser confusion between the validation layer and the HTTP request library. The hostname validation used a differe...

GitHub Enterprise Server Access Control Vulnerability

GitHub Enterprise Server is an open-source application developed by GitHub in the United States. It provides a scalable and easy-to-manage platform by allowing users to set their GitHub instances as virtual devices. Prior to version 3.21 of GitHub Enterprise Server, there was an access control...

GitHub: Able to bypass authorization logic and gain more access then intended

A UI misrepresentation vulnerability was identified in GitHub Enterprise Server that allowed an OAuth application to gain unintended access to an organization's runner management. The vulnerability was fixed in versions 3.21.2, 3.20.4, 3.19.8, 3.18.11, 3.17.17, and 3.16.20. This vulnerability was...

GitHub Enterprise 3.x < 3.14.25 / 3.15.x < 3.15.20 / 3.16.x < 3.16.16 / 3.17.x < 3.17.13 / 3.18.x < 3.18.7 / 3.19.x < 3.19.4 RCE (CVE-2026-3854)

The version of GitHub Enterprise installed on the remote host is affected by a remote code execution vulnerability: - An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote...

GitHub Enterprise Server Code Execution

The vulnerability of the corporate version of the GitHub Enterprise Server is related to the lack of measures taken at the management level to protect data. Exploitation of this vulnerability could allow a malicious actor to execute arbitrary code remotely...

Exploit for Command Injection in Github Enterprise_Server

ExploitCVE-2026-3854 CVE-2026-3854 is a Remote Code Executio...

Researchers Discover Critical GitHub CVE-2026-3854 RCE Flaw Exploitable via Single Git Push

Cybersecurity researchers have disclosed details of a critical security vulnerability impacting GitHub.com and GitHub Enterprise Server that could allow an authenticated user to obtain remote code execution with a single "git push" command. The flaw, tracked as CVE-2026-3854 CVSS score: 8.7, is a...

Securing GitHub: Wiz Research uncovers Remote Code Execution in GitHub.com and GitHub Enterprise Server (CVE-2026-3854)

Details on CVE-2026-3854: A critical flaw in GitHub’s internal git infrastructure enabling RCE on GitHub.com and GitHub Enterprise Server...

EUVD-2026-24554

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an attacker to extract sensitive environment variables from the instance through a timing side-channel attack against the notebook rendering service. When private mode was disabled, the notebo...

EUVD-2026-24550

An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile upload policy API endpoint did not perform an early authorization check, and validation error...