CVE-2026-3306 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2026-3306
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.03 Probability of exploitation activity being observed over the next 30 days (9th percentile)
CVSS score for CVE-2026-3306
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
4.3 Medium
Products affected by CVE-2026-3306
Enterprise Server 3.12.4
Enterprise Server 3.13.0
Enterprise Server 3.13.16
Enterprise Server 3.14.7
Enterprise Server 3.16.0
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-3306 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 93 58.13%
CA 8 5.00%
JP 7 4.38%
DE 6 3.75%
FR 6 3.75%
SE 5 3.13%
GB 5 3.13%
AU 5 3.13%
SG 4 2.50%
IE 4 2.50%

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CVE-2026-3306 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 142 90.45%
Education 6 3.82%
Telecommunications 3 1.91%
Aerospace/Defense 2 1.27%
Government/Politics 2 1.27%
Manufacturing 2 1.27%

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