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Vulnerability record · CVE-2026-3306 · published 10 March 2026

CVE-2026-3306: Github enterprise server insecure direct object reference vulnerability

Github · Enterprise Server

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.

5.3 CVSS 4.0 Medium EPSS 0.43% · top 65.5% CWE-639 · Insecure direct object reference
5.3CVSS 4.0 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 Release Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 Release Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 Release Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 Release Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 Release Notes
https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3 Release Notes

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-3306), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.