CVE-2026-1999 Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized merging of pull requests

An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to merge their own pull request into a repository without having push access by exploiting an authorization bypass in the enableautomerge mutation for pull requests. This issue only affect...

CVE-2026-1999

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to access internal services bound to loopback or unspecified addresses, potentially disrupting background job processing, accessing administrative endpoints, metrics, and...

CVE-2026-1355 Missing Authorization Check in GitHub Enterprise Server Allows Unauthorized Uploads to Repository Migration Exports

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration...

CVE-2026-1355 Missing Authorization Check in GitHub Enterprise Server Allows Unauthorized Uploads to Repository Migration Exports

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration...

CVE-2026-1355

GitHub Enterprise Server contains a Missing Authorization vulnerability in the repository migration upload endpoint. An authenticated attacker could supply a migration identifier to overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repo...

CVE-2026-0573 Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution

An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repositorypages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a...

CVE-2026-0573

GitHub Enterprise Server suffered an URL redirection vulnerability in the repository_pages API where HTTP redirects preserved the Authorization header containing a privileged JWT. An authenticated user could redirect artifact URL fetches to an attacker-controlled domain, exfiltrate the Actions.Ma...

CVE-2026-0573 Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution

An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repositorypages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a...

GitHub Enterprise Server 安全漏洞

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. There are security vulnerabilities in versions of GitHub Enterprise Server prior ...

GitHub Enterprise Server 安全漏洞

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 3.20 of GitHub Enterprise Server, there was a security...

GitHub Enterprise Server 安全漏洞

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 3.19 of GitHub Enterprise Server, there was a security...

PT-2026-20504

An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to merge their own pull request into a repository without having push access by exploiting an authorization bypass in the enable auto merge mutation for pull requests. This issue only...

PT-2026-20495

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.19 GitHub Enterprise Server versions 3.19.2 GitHub Enterprise Server versions 3.18.4 GitHub Enterprise Server versions 3.17.10 GitHub Enterprise Server versions 3.16.13 GitHub Enterprise Server...

PT-2026-20503

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration...

GitHub: PATs without the required scope can leak issues

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...

GitHub: Missing Access Control in MigrationFile allows attacker to upload files to any Migration

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized content to be uploaded to a user's repository migration export due to a missing authorization check in the repository migration upload endpoint. The vulnerability could be exploited by...

CVE-2021-41599

A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This...

CVE-2021-22862

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with the ability to fork a repository to disclose Actions secrets for the parent repository of the fork. This vulnerability existed due to a flaw that allowed the base reference ...

CVE-2021-22867

A path traversal vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to read files on the GitHub Enterprise Server...

CVE-2021-22863

An improper access control vulnerability was identified in the GitHub Enterprise Server GraphQL API that allowed authenticated users of the instance to modify the maintainer collaboration permission of a pull request without proper authorization. By exploiting this vulnerability, an attacker woul...