CVE-2026-3306

low-risk
Published 2026-03-10

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.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Github

References (6)

Release Notes https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.24
Release Notes https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.19
Release Notes https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15
Release Notes https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.12
Release Notes https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6
Release Notes https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal