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-2026-34211

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description An improper authorization issue exists where an authenticated attacker can determine the names of private repositories using their numeric ID. This occurs because the mobile upload...

PT-2026-34212

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.21 Description An improper authorization issue exists in scoped user-to-server ghu token authorization. An authenticated attacker can access private repositories outside the intended installation...

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-2026-5845: Authorization Bypass Through User-Controlled Key

An improper authorization vulnerability in scoped user-to-server ghu token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can include write operations, via an authorization fallback that...

GitHub: GitHub user to server tokens can create issues in any public repository

A vulnerability was identified in GitHub Enterprise Server that allowed a user-to-server token scoped to a GitHub App installation to perform certain write operations on public repositories outside the token's intended scope. The authorization check only verified that the installation had read...

CVE-2026-3306

An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed a user with read access to a repository and write access to a project to modify issue and pull request metadata through the project. When adding an item to a project that already existed, column value...

CVE-2026-3854

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 code execution on the instance. During a git push operation, user-supplied push option values were not properly...

CVE-2026-2266

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 HTM...

EUVD-2026-10792

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 HTM...

EUVD-2026-10793

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 HTM...

EUVD-2026-10828

An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token PAT lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user...

EUVD-2026-10829

An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token PAT lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user...

CVE-2026-3582

An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token PAT lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user...

CVE-2026-3582

An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token PAT lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user...

CVE-2026-2266

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 HTM...

CVE-2026-2266

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 HTM...

CVE-2026-3582

CVE-2026-3582 affects GitHub Enterprise Server. An Incorrect Authorization vulnerability allowed an authenticated user with a classic PAT lacking the repo scope to retrieve issues and commits from private/internal repositories via the search REST API, provided the user already had access to the r...

CVE-2026-3582 Incorrect Authorization in GitHub Enterprise Server allows access to issue and commit search results without repo scope

An Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with a classic personal access token PAT lacking the repo scope to retrieve issues and commits from private and internal repositories via the search REST API endpoints. The user...

CVE-2026-2266 Improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed cross-site scripting via task list content and enabled arbitrary HTML injection

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 HTM...