CVE-2026-103620

A missing authorization vulnerability in GitHub Enterprise Server allows repository collaborators with write access to delete the current default branch using the GraphQL API . This flaw enables an attacker to set an attacker-controlled branch as the new default. In repositories requiring pull-re...

PT-2026-107111

A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed a repository collaborator with write access to delete the current default branch through the GraphQL API and cause an attacker-controlled branch to become the new default. In repositories that required...

CVE-2026-103620: Missing Authorization

A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed a repository collaborator with write access to delete the current default branch through the GraphQL API and cause an attacker-controlled branch to become the new default. In repositories that required...

CVE-2026-96890: Server-Side Request Forgery (SSRF)

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed a repository contributor to cause the appliance to issue requests to attacker-controlled internal hosts, which could be chained to achieve remote code execution on the appliance. The secret...

PT-2026-107128

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.20 through 3.20.8 GitHub Enterprise Server versions 3.21 through 3.21.6 GitHub Enterprise Server versions 3.22 through 3.22.1 Description A Server-Side Request Forgery SSRF issue exists where the secret...

GitHub Enterprise Server CVE-2026-3854 Detection

Detects GitHub Enterprise Server instances potentially vulnerable to CVE-2026-3854 push option header injection leading to RCE. Checks GHES fingerprint and git push option endpoint behaviour. !/usr/bin/env python3 -- coding: utf-8 -- """Detect GitHub Enterprise Server push-option RCE surface...

GitHub Enterprise Server Push Option RCE (CVE-2026-3854)

Exploits CVE-2026-3854 in GitHub Enterprise Server: crafted git push option values inject internal service headers during push operations, leading to remote code execution. Requires push access to a repository. !/usr/bin/env python3 -- coding: utf-8 -- """GitHub Enterprise Server push-option RCE...

CVE-2026-77987

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...

CVE-2026-77912

A stored cross-site scripting XSS vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without...

CVE-2026-75101

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to th...

CVE-2026-75101 Authorization bypass vulnerability in GitHub Enterprise Server allowed reading of private pull request diffs and patches via repository name collision

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to th...

CVE-2026-75101 Authorization bypass vulnerability in GitHub Enterprise Server allowed reading of private pull request diffs and patches via repository name collision

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to th...

EUVD-2026-84874

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to th...

CVE-2026-75101

An authorization bypass vulnerability exists in GitHub Enterprise Server (versions prior to 3.22) due to a repository name collision flaw. Access tokens for raw pull request diffs and patches were incorrectly scoped to the repository name and pull request number rather than a globally unique iden...

CVE-2026-77912 Stored cross-site scripting vulnerability in GitHub Enterprise Server allowed HTML attribute injection via the Markdown rendering pipeline

A stored cross-site scripting XSS vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without...

CVE-2026-77912

A stored cross-site scripting (XSS) vulnerability exists in GitHub Enterprise Server within the Markdown rendering pipeline . The flaw occurs because the pipeline rewrote quote characters in already-sanitized HTML without performing subsequent re-sanitization, allowing an authenticated attacker t...

EUVD-2026-84873

A stored cross-site scripting XSS vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without...

CVE-2026-77912 Stored cross-site scripting vulnerability in GitHub Enterprise Server allowed HTML attribute injection via the Markdown rendering pipeline

A stored cross-site scripting XSS vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without...

CVE-2026-77987 GitHub Enterprise Server notebook viewer vulnerable to Server-side request forgery

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...

CVE-2026-77987 GitHub Enterprise Server notebook viewer vulnerable to Server-side request forgery

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...