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Medium · 5.3 Public exploit CVE-2026-3306 EUVD-2026-10742GHSA-9ggx-qhc4-9pww

Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access

Published Mar 10, 2026 · Updated Mar 11, 2026 · Assigned by GitHub_P

Vendor: GitHub Product: Enterprise Server

Description

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.

Affected products

VendorProductAffectedFixed
GitHub Enterprise Server 3.14.0 – ≤ 3.14.23, 3.15.0 – ≤ 3.15.18, 3.16.0 – ≤ 3.16.14, 3.17.0 – ≤ 3.17.11, 3.18.0 – ≤ 3.18.5, 3.19.0 – ≤ 3.19.2 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References