CVE-2026-3306
Received
Received - Intake
Improper Authorization in GitHub Enterprise Server Allows Metadata Modification
Vulnerability report for CVE-2026-3306, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-03-10
Last updated on: 2026-03-12
Assigner: GitHub, Inc. (Products Only)
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| github | enterprise_server | From 3.17.0 (inc) to 3.17.12 (exc) |
| github | enterprise_server | From 3.18.0 (inc) to 3.18.6 (exc) |
| github | enterprise_server | From 3.19.0 (inc) to 3.19.3 (exc) |
| github | enterprise_server | to 3.14.24 (exc) |
| github | enterprise_server | From 3.15.0 (inc) to 3.15.19 (exc) |
| github | enterprise_server | From 3.16.0 (inc) to 3.16.15 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| 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. |
