CVE-2026-3306 MEDIUM

CVE-2026-3306: Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access

Vendor Github
Product Enterprise Server
Weakness CWE-639 · IDOR
Published March 10, 2026
Last update March 11, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 10, 2026 CVE published
March 11, 2026 Record updated