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...

EUVD-2026-84872

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-2026-75101: Authorization Bypass Through User-Controlled Key

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-2026-77912: Improper Neutralization of Input During Web Page Generation

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...

PT-2026-97047

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.22 Description An authorization bypass allows authenticated users to read the raw diff or patch of pull requests in private repositories. This occurs because access tokens for these resources are...

PT-2026-97051

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.17 through 3.17.20 GitHub Enterprise Server versions 3.18 through 3.18.14 GitHub Enterprise Server versions 3.19 through 3.19.11 GitHub Enterprise Server versions 3.20 through 3.20.7 GitHub Enterprise Server...

PT-2026-97052

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.17 through 3.22 Description A server-side request forgery SSRF issue exists in the notebook viewer. While the system validates the scheme and host of a user-supplied URL, it fails to validate the port. This...

CVE-2026-77987: Server-Side Request Forgery (SSRF)

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-2026-54167

A flaw was found in Pipelines-as-Code. The GitHub App provider incorrectly processes webhook events by accepting an untrusted X-GitHub-Enterprise-Host header as the API host before validating the webhook signature. An unauthenticated attacker can exploit this by sending a specially crafted webhoo...

CVE-2026-54167

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

CVE-2026-54167

Pipelines-as-Code , a CI/CD system for defining Tekton pipelines in source repositories, is affected in its GitHub App provider . Prior to versions 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the provider accepts the X-GitHub-Enterprise-Host request header as the API host before webhook signature validat...

CVE-2026-54167 Pipelines-as-Code GitHub App token request can be redirected via untrusted Enterprise Host header

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

CVE-2026-54167 Pipelines-as-Code GitHub App token request can be redirected via untrusted Enterprise Host header

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

EUVD-2026-78587

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

CVE-2026-54167

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

CVE-2026-54167: Insufficient Verification of Data Authenticity

Pipelines-as-Code is a CI/CD system that lets users define Tekton pipelines in source code repositories. Prior to 0.37.8, 0.39.6, 0.42.1, and 0.48.0, the GitHub App provider accepts X-GitHub-Enterprise-Host as the API host while processing webhook events containing an installation.id, before...

EUVD-2026-69715

A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all...

EUVD-2026-69714

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster...

EUVD-2026-69716

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...

CVE-2026-76851

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...