GitHub Enterprise Server up to 3.19.2 Pull Request authorization

Summaryinfo

A vulnerability was found in GitHub Enterprise Server up to 3.19.2. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Pull Request Handler. This manipulation causes authorization. The identification of this vulnerability is CVE-2026-3306. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in GitHub Enterprise Server up to 3.19.2. Affected by this vulnerability is an unknown function of the component Pull Request Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect integrity. The summary by CVE is:

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.

The weakness was shared by ahacker1. It is possible to read the advisory at docs.github.com. This vulnerability is known as CVE-2026-3306 since 02/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 or 3.19.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0685). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Microsoft GitHub Enterprise

Productinfo

Type

• Bug Tracking Software

Vendor

• GitHub

Name

• Enterprise Server

Version

• 3.14.0
• 3.14.1
• 3.14.2
• 3.14.3
• 3.14.4
• 3.14.5
• 3.14.6
• 3.14.7
• 3.14.8
• 3.14.9
• 3.14.10
• 3.14.11
• 3.14.12
• 3.14.13
• 3.14.14
• 3.14.15
• 3.14.16
• 3.14.17
• 3.14.18
• 3.14.19
• 3.14.20
• 3.14.21
• 3.14.22
• 3.14.23
• 3.15.0
• 3.15.1
• 3.15.2
• 3.15.3
• 3.15.4
• 3.15.5
• 3.15.6
• 3.15.7
• 3.15.8
• 3.15.9
• 3.15.10
• 3.15.11
• 3.15.12
• 3.15.13
• 3.15.14
• 3.15.15
• 3.15.16
• 3.15.17
• 3.15.18
• 3.16.0
• 3.16.1
• 3.16.2
• 3.16.3
• 3.16.4
• 3.16.5
• 3.16.6
• 3.16.7
• 3.16.8
• 3.16.9
• 3.16.10
• 3.16.11
• 3.16.12
• 3.16.13
• 3.16.14
• 3.17.0
• 3.17.1
• 3.17.2
• 3.17.3
• 3.17.4
• 3.17.5
• 3.17.6
• 3.17.7
• 3.17.8
• 3.17.9
• 3.17.10
• 3.17.11
• 3.18.0
• 3.18.1
• 3.18.2
• 3.18.3
• 3.18.4
• 3.18.5
• 3.19.0
• 3.19.1
• 3.19.2

License

• open-source

CPE 2.3info

• 🔒
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CPE 2.2info

• 🔒
• 🔒
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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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