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136 vulnerabilities found for Enterprise Server by GitHub

CVE-2026-5921 (GCVE-0-2026-5921)

Vulnerability from nvd – Published: 2026-04-21 22:11 – Updated: 2026-04-22 13:18
VLAI?
Title
Server-Side Request Forgery in GitHub Enterprise Server allowed extraction of sensitive environment variables via timing side-channel attack
Summary
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 notebook viewer followed HTTP redirects without revalidating the destination host, enabling an unauthenticated SSRF to internal services. By chaining this with regex filter queries against an internal API and measuring response time differences, an attacker could infer secret values character by character. Exploitation required that private mode be disabled and that the attacker be able to chain the instance's open redirect endpoint through an external redirect to reach internal services. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.26, 3.15.21, 3.16.17, 3.17.14, 3.18.8, 3.19.5, and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , < 3.14.26 (semver)
Affected: 3.15.0 , < 3.15.21 (semver)
Affected: 3.16.0 , < 3.16.17 (semver)
Affected: 3.17.0 , < 3.17.14 (semver)
Affected: 3.18.0 , < 3.18.8 (semver)
Affected: 3.19.0 , < 3.19.5 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
R31n
Show details on NVD website

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CVE-2026-5845 (GCVE-0-2026-5845)

Vulnerability from nvd – Published: 2026-04-21 22:42 – Updated: 2026-04-22 18:04
VLAI?
Title
Improper authorization fallback allows scoped user-to-server token installation escape in GitHub Enterprise Server
Summary
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 treated a revoked/deleted installation as a global installation context, which could be chained with token revocation timing and SSH push attribution to obtain and reuse a victim-scoped token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.20.0 , < 3.20.1 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.14.0 , ≤ 3.14.25 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-5512 (GCVE-0-2026-5512)

Vulnerability from nvd – Published: 2026-04-21 22:12 – Updated: 2026-04-22 17:39
VLAI?
Title
Improper authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository names via mobile upload policy API
Summary
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 messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-201 - Insertion of sensitive information into sent data
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.25 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-4821 (GCVE-0-2026-4821)

Vulnerability from nvd – Published: 2026-04-21 22:12 – Updated: 2026-04-22 13:17
VLAI?
Title
Proxy configuration command injection vulnerability found in GitHub Enterprise Server Management Console configuration API
Summary
An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an authenticated Management Console administrator to execute arbitrary OS commands via shell metacharacter injection in proxy configuration fields such as http_proxy. Exploitation of this vulnerability required access to the GitHub Enterprise Server instance and administrator privileges to the Management Console. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.20.0 , < 3.20.1 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.14.0 , ≤ 3.14.25 (semver)
Create a notification for this product.
Credits
Seokchan Yoon
Show details on NVD website

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CVE-2026-4296 (GCVE-0-2026-4296)

Vulnerability from nvd – Published: 2026-04-21 22:12 – Updated: 2026-04-22 13:16
VLAI?
Title
Incorrect Regular Expression vulnerability in GitHub Enterprise Server allowed unauthorized access to user accounts via OAuth callback URL validation bypass
Summary
An incorrect regular expression vulnerability was identified in GitHub Enterprise Server that allowed an attacker to bypass OAuth redirect URI validation. An attacker with knowledge of a first-party OAuth application's registered callback URL could craft a malicious authorization link that, when clicked by a victim, would redirect the OAuth authorization code to an attacker-controlled domain. This could allow the attacker to gain unauthorized access to the victim's account with the scopes granted to the OAuth application. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-185 - Incorrect Regular Expression
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.25 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
ahacker1 hacktron
Show details on NVD website

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CVE-2026-3307 (GCVE-0-2026-3307)

Vulnerability from nvd – Published: 2026-04-21 22:23 – Updated: 2026-04-22 18:00
VLAI?
Title
Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers
Summary
An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.24 (semver)
Affected: 3.15.0 , ≤ 3.15.19 (semver)
Affected: 3.16.0 , ≤ 3.16.15 (semver)
Affected: 3.17.0 , ≤ 3.17.12 (semver)
Affected: 3.18.0 , ≤ 3.18.6 (semver)
Affected: 3.19.0 , ≤ 3.19.3 (semver)
Affected: 3.20 , ≤ 3.20.0 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-3582 (GCVE-0-2026-3582)

Vulnerability from nvd – Published: 2026-03-10 18:56 – Updated: 2026-03-11 14:13
VLAI?
Title
Incorrect Authorization in GitHub Enterprise Server allows access to issue and commit search results without repo scope
Summary
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 must have had existing access to the repository through organization membership or as a collaborator for the vulnerability to be exploitable. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.16.15, 3.17.12, 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.16.0 , ≤ 3.16.14 (semver)
Affected: 3.17.0 , ≤ 3.17.11 (semver)
Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
Sergej Ljubojevic
Show details on NVD website

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CVE-2026-2266 (GCVE-0-2026-2266)

Vulnerability from nvd – Published: 2026-03-10 18:55 – Updated: 2026-03-11 14:15
VLAI?
Title
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
Summary
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 HTML to be injected into the page. An authenticated attacker could craft malicious task list items in issues or pull requests to execute arbitrary scripts in the context of another user's browser session. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
André Storfjord Kristiansen
Show details on NVD website

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CVE-2026-3854 (GCVE-0-2026-3854)

Vulnerability from nvd – Published: 2026-03-10 17:37 – Updated: 2026-04-17 17:57
VLAI?
Title
Remote code execution via git push option injection in GitHub Enterprise Server
Summary
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 sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4.
CWE
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.24 (semver)
Affected: 3.15.0 , ≤ 3.15.19 (semver)
Affected: 3.16.0 , ≤ 3.16.15 (semver)
Affected: 3.17.0 , ≤ 3.17.12 (semver)
Affected: 3.18.0 , ≤ 3.18.6 (semver)
Affected: 3.19.0 , ≤ 3.19.3 (semver)
Create a notification for this product.
Credits
Sagi Tzadik @ Wiz.io
Show details on NVD website

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CVE-2026-3306 (GCVE-0-2026-3306)

Vulnerability from nvd – Published: 2026-03-10 17:46 – Updated: 2026-03-11 14:17
VLAI?
Title
Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access
Summary
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 updates were applied without verifying the actor's repository write permissions. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3.
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.23 (semver)
Affected: 3.15.0 , ≤ 3.15.18 (semver)
Affected: 3.16.0 , ≤ 3.16.14 (semver)
Affected: 3.17.0 , ≤ 3.17.11 (semver)
Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-1999 (GCVE-0-2026-1999)

Vulnerability from nvd – Published: 2026-02-18 20:44 – Updated: 2026-04-14 15:09
VLAI?
Title
Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized merging of pull requests
Summary
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 affected repositories that allow forking as the attack relies on opening a pull request from an attacker-controlled fork into the target repository. Exploitation was only possible in specific scenarios. It required a clean pull request status and only applied to branches without branch protection rules enabled. This vulnerability affected GitHub Enterprise Server versions prior to 3.19.2, 3.18.5, and 3.17.11, and was fixed in versions 3.19.2, 3.18.5, and 3.17.11. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-863 - Incorrect Authorization
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.17.0 , < 3.17.11 (semver)
Affected: 3.18.0 , < 3.18.5 (semver)
Affected: 3.19.0 , < 3.19.2 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-1355 (GCVE-0-2026-1355)

Vulnerability from nvd – Published: 2026-02-18 20:42 – Updated: 2026-02-20 19:36
VLAI?
Title
Missing Authorization Check in GitHub Enterprise Server Allows Unauthorized Uploads to Repository Migration Exports
Summary
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 identifier, an attacker could overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An attacker would require authentication to the victim's GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.19.0 , ≤ 3.19.1 (semver)
Affected: 3.18.0 , ≤ 3.18.4 (semver)
Affected: 3.17.0 , ≤ 3.17.10 (semver)
Affected: 3.16.0 , ≤ 3.16.13 (semver)
Affected: 3.15.0 , ≤ 3.15.17 (semver)
Affected: 3.14.0 , ≤ 3.14.22 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-0573 (GCVE-0-2026-0573)

Vulnerability from nvd – Published: 2026-02-18 20:37 – Updated: 2026-02-18 21:20
VLAI?
Title
Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution
Summary
An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14 , ≤ 3.14.21 (semver)
Affected: 3.15 , ≤ 3.15.16 (semver)
Affected: 3.16 , ≤ 3.16.12 (semver)
Affected: 3.17 , ≤ 3.17.9 (semver)
Affected: 3.18 , ≤ 3.18.3 (semver)
Affected: 3.19 , ≤ 3.19.1 (semver)
Create a notification for this product.
Credits
R31n
Show details on NVD website

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CVE-2025-13744 (GCVE-0-2025-13744)

Vulnerability from nvd – Published: 2026-01-06 20:44 – Updated: 2026-01-06 21:02
VLAI?
Title
Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed rendering of malicious HTML
Summary
An Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed attacker controlled HTML to be rendered by the Filter component (search) across GitHub that could be used to exfiltrate sensitive information. An attacker would require permissions to create or modify the names of milestones, issues, pull requests, or similar entities that are rendered in the vulnerable filter/search components. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.1, and 3.18.2, 3.17.8, 3.16.11, 3.15.15, and 3.14.20. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.19 (semver)
Affected: 3.15.0 , ≤ 3.15.14 (semver)
Affected: 3.16.0 , ≤ 3.16.10 (semver)
Affected: 3.17.0 , ≤ 3.17.7 (semver)
Affected: 3.18.0 , ≤ 3.18.1 (semver)
Affected: 3.19 , ≤ 3.19.0 (semver)
Create a notification for this product.
Credits
Roshan Kudave Johan Carlsson
Show details on NVD website

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CVE-2025-14046 (GCVE-0-2025-14046)

Vulnerability from nvd – Published: 2025-12-11 17:52 – Updated: 2025-12-11 18:48
VLAI?
Title
Insufficient HTML Sanitization Allows User-Controlled DOM Elements to Overwrite Server-Initialized Data Islands and Trigger Unintended Server-Side POST Requests
Summary
An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Unaffected: 3.19.0 (semver)
Affected: 3.18.0 , ≤ 3.18.2 (semver)
Affected: 3.17.0 , ≤ 3.17.8 (semver)
Affected: 3.16.0 , ≤ 3.16.11 (semver)
Affected: 3.15.0 , ≤ 3.15.15 (semver)
Affected: 3.14.0 , ≤ 3.14.20 (semver)
Create a notification for this product.
Credits
André Storfjord Kristiansen
Show details on NVD website

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CVE-2026-5845 (GCVE-0-2026-5845)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:42 – Updated: 2026-04-22 18:04
VLAI?
Title
Improper authorization fallback allows scoped user-to-server token installation escape in GitHub Enterprise Server
Summary
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 treated a revoked/deleted installation as a global installation context, which could be chained with token revocation timing and SSH push attribution to obtain and reuse a victim-scoped token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.20.0 , < 3.20.1 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.14.0 , ≤ 3.14.25 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-3307 (GCVE-0-2026-3307)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:23 – Updated: 2026-04-22 18:00
VLAI?
Title
Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers
Summary
An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.24 (semver)
Affected: 3.15.0 , ≤ 3.15.19 (semver)
Affected: 3.16.0 , ≤ 3.16.15 (semver)
Affected: 3.17.0 , ≤ 3.17.12 (semver)
Affected: 3.18.0 , ≤ 3.18.6 (semver)
Affected: 3.19.0 , ≤ 3.19.3 (semver)
Affected: 3.20 , ≤ 3.20.0 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-5512 (GCVE-0-2026-5512)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:12 – Updated: 2026-04-22 17:39
VLAI?
Title
Improper authorization vulnerability in GitHub Enterprise Server allowed disclosure of private repository names via mobile upload policy API
Summary
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 messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-201 - Insertion of sensitive information into sent data
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.25 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-4296 (GCVE-0-2026-4296)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:12 – Updated: 2026-04-22 13:16
VLAI?
Title
Incorrect Regular Expression vulnerability in GitHub Enterprise Server allowed unauthorized access to user accounts via OAuth callback URL validation bypass
Summary
An incorrect regular expression vulnerability was identified in GitHub Enterprise Server that allowed an attacker to bypass OAuth redirect URI validation. An attacker with knowledge of a first-party OAuth application's registered callback URL could craft a malicious authorization link that, when clicked by a victim, would redirect the OAuth authorization code to an attacker-controlled domain. This could allow the attacker to gain unauthorized access to the victim's account with the scopes granted to the OAuth application. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-185 - Incorrect Regular Expression
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.25 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
ahacker1 hacktron
Show details on NVD website

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CVE-2026-4821 (GCVE-0-2026-4821)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:12 – Updated: 2026-04-22 13:17
VLAI?
Title
Proxy configuration command injection vulnerability found in GitHub Enterprise Server Management Console configuration API
Summary
An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an authenticated Management Console administrator to execute arbitrary OS commands via shell metacharacter injection in proxy configuration fields such as http_proxy. Exploitation of this vulnerability required access to the GitHub Enterprise Server instance and administrator privileges to the Management Console. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.20.0 , < 3.20.1 (semver)
Affected: 3.19.0 , ≤ 3.19.4 (semver)
Affected: 3.18.0 , ≤ 3.18.7 (semver)
Affected: 3.17.0 , ≤ 3.17.13 (semver)
Affected: 3.16.0 , ≤ 3.16.16 (semver)
Affected: 3.15.0 , ≤ 3.15.20 (semver)
Affected: 3.14.0 , ≤ 3.14.25 (semver)
Create a notification for this product.
Credits
Seokchan Yoon
Show details on NVD website

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CVE-2026-5921 (GCVE-0-2026-5921)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:11 – Updated: 2026-04-22 13:18
VLAI?
Title
Server-Side Request Forgery in GitHub Enterprise Server allowed extraction of sensitive environment variables via timing side-channel attack
Summary
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 notebook viewer followed HTTP redirects without revalidating the destination host, enabling an unauthenticated SSRF to internal services. By chaining this with regex filter queries against an internal API and measuring response time differences, an attacker could infer secret values character by character. Exploitation required that private mode be disabled and that the attacker be able to chain the instance's open redirect endpoint through an external redirect to reach internal services. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.26, 3.15.21, 3.16.17, 3.17.14, 3.18.8, 3.19.5, and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , < 3.14.26 (semver)
Affected: 3.15.0 , < 3.15.21 (semver)
Affected: 3.16.0 , < 3.16.17 (semver)
Affected: 3.17.0 , < 3.17.14 (semver)
Affected: 3.18.0 , < 3.18.8 (semver)
Affected: 3.19.0 , < 3.19.5 (semver)
Affected: 3.20.0 , < 3.20.1 (semver)
Create a notification for this product.
Credits
R31n
Show details on NVD website

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CVE-2026-3582 (GCVE-0-2026-3582)

Vulnerability from cvelistv5 – Published: 2026-03-10 18:56 – Updated: 2026-03-11 14:13
VLAI?
Title
Incorrect Authorization in GitHub Enterprise Server allows access to issue and commit search results without repo scope
Summary
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 must have had existing access to the repository through organization membership or as a collaborator for the vulnerability to be exploitable. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.16.15, 3.17.12, 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.16.0 , ≤ 3.16.14 (semver)
Affected: 3.17.0 , ≤ 3.17.11 (semver)
Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
Sergej Ljubojevic
Show details on NVD website

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CVE-2026-2266 (GCVE-0-2026-2266)

Vulnerability from cvelistv5 – Published: 2026-03-10 18:55 – Updated: 2026-03-11 14:15
VLAI?
Title
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
Summary
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 HTML to be injected into the page. An authenticated attacker could craft malicious task list items in issues or pull requests to execute arbitrary scripts in the context of another user's browser session. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
André Storfjord Kristiansen
Show details on NVD website

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CVE-2026-3306 (GCVE-0-2026-3306)

Vulnerability from cvelistv5 – Published: 2026-03-10 17:46 – Updated: 2026-03-11 14:17
VLAI?
Title
Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access
Summary
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 updates were applied without verifying the actor's repository write permissions. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3.
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.23 (semver)
Affected: 3.15.0 , ≤ 3.15.18 (semver)
Affected: 3.16.0 , ≤ 3.16.14 (semver)
Affected: 3.17.0 , ≤ 3.17.11 (semver)
Affected: 3.18.0 , ≤ 3.18.5 (semver)
Affected: 3.19.0 , ≤ 3.19.2 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-3854 (GCVE-0-2026-3854)

Vulnerability from cvelistv5 – Published: 2026-03-10 17:37 – Updated: 2026-04-17 17:57
VLAI?
Title
Remote code execution via git push option injection in GitHub Enterprise Server
Summary
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 sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4.
CWE
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.24 (semver)
Affected: 3.15.0 , ≤ 3.15.19 (semver)
Affected: 3.16.0 , ≤ 3.16.15 (semver)
Affected: 3.17.0 , ≤ 3.17.12 (semver)
Affected: 3.18.0 , ≤ 3.18.6 (semver)
Affected: 3.19.0 , ≤ 3.19.3 (semver)
Create a notification for this product.
Credits
Sagi Tzadik @ Wiz.io
Show details on NVD website

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CVE-2026-1999 (GCVE-0-2026-1999)

Vulnerability from cvelistv5 – Published: 2026-02-18 20:44 – Updated: 2026-04-14 15:09
VLAI?
Title
Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized merging of pull requests
Summary
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 affected repositories that allow forking as the attack relies on opening a pull request from an attacker-controlled fork into the target repository. Exploitation was only possible in specific scenarios. It required a clean pull request status and only applied to branches without branch protection rules enabled. This vulnerability affected GitHub Enterprise Server versions prior to 3.19.2, 3.18.5, and 3.17.11, and was fixed in versions 3.19.2, 3.18.5, and 3.17.11. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-863 - Incorrect Authorization
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.17.0 , < 3.17.11 (semver)
Affected: 3.18.0 , < 3.18.5 (semver)
Affected: 3.19.0 , < 3.19.2 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-1355 (GCVE-0-2026-1355)

Vulnerability from cvelistv5 – Published: 2026-02-18 20:42 – Updated: 2026-02-20 19:36
VLAI?
Title
Missing Authorization Check in GitHub Enterprise Server Allows Unauthorized Uploads to Repository Migration Exports
Summary
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 identifier, an attacker could overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An attacker would require authentication to the victim's GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.19.0 , ≤ 3.19.1 (semver)
Affected: 3.18.0 , ≤ 3.18.4 (semver)
Affected: 3.17.0 , ≤ 3.17.10 (semver)
Affected: 3.16.0 , ≤ 3.16.13 (semver)
Affected: 3.15.0 , ≤ 3.15.17 (semver)
Affected: 3.14.0 , ≤ 3.14.22 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website

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CVE-2026-0573 (GCVE-0-2026-0573)

Vulnerability from cvelistv5 – Published: 2026-02-18 20:37 – Updated: 2026-02-18 21:20
VLAI?
Title
Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution
Summary
An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14 , ≤ 3.14.21 (semver)
Affected: 3.15 , ≤ 3.15.16 (semver)
Affected: 3.16 , ≤ 3.16.12 (semver)
Affected: 3.17 , ≤ 3.17.9 (semver)
Affected: 3.18 , ≤ 3.18.3 (semver)
Affected: 3.19 , ≤ 3.19.1 (semver)
Create a notification for this product.
Credits
R31n
Show details on NVD website

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CVE-2025-13744 (GCVE-0-2025-13744)

Vulnerability from cvelistv5 – Published: 2026-01-06 20:44 – Updated: 2026-01-06 21:02
VLAI?
Title
Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed rendering of malicious HTML
Summary
An Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed attacker controlled HTML to be rendered by the Filter component (search) across GitHub that could be used to exfiltrate sensitive information. An attacker would require permissions to create or modify the names of milestones, issues, pull requests, or similar entities that are rendered in the vulnerable filter/search components. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.1, and 3.18.2, 3.17.8, 3.16.11, 3.15.15, and 3.14.20. This vulnerability was reported via the GitHub Bug Bounty program.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.19 (semver)
Affected: 3.15.0 , ≤ 3.15.14 (semver)
Affected: 3.16.0 , ≤ 3.16.10 (semver)
Affected: 3.17.0 , ≤ 3.17.7 (semver)
Affected: 3.18.0 , ≤ 3.18.1 (semver)
Affected: 3.19 , ≤ 3.19.0 (semver)
Create a notification for this product.
Credits
Roshan Kudave Johan Carlsson
Show details on NVD website

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CVE-2025-14046 (GCVE-0-2025-14046)

Vulnerability from cvelistv5 – Published: 2025-12-11 17:52 – Updated: 2025-12-11 18:48
VLAI?
Title
Insufficient HTML Sanitization Allows User-Controlled DOM Elements to Overwrite Server-Initialized Data Islands and Trigger Unintended Server-Side POST Requests
Summary
An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
Impacted products
Vendor Product Version
GitHub Enterprise Server Unaffected: 3.19.0 (semver)
Affected: 3.18.0 , ≤ 3.18.2 (semver)
Affected: 3.17.0 , ≤ 3.17.8 (semver)
Affected: 3.16.0 , ≤ 3.16.11 (semver)
Affected: 3.15.0 , ≤ 3.15.15 (semver)
Affected: 3.14.0 , ≤ 3.14.20 (semver)
Create a notification for this product.
Credits
André Storfjord Kristiansen
Show details on NVD website

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