CVE-2026-3306 json
Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access
published 2026-03-10 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-10742
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- GitHub Enterprise Server 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6, 3.19.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | 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 |
| CNA | 4.0 | 5.3 | 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:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- GitHub Enterprise Server
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
docs.github.com
/en/enterprise-server@3.14/admin/release-notes#3.14.24
release-notes
-
docs.github.com
/en/enterprise-server@3.15/admin/release-notes#3.15.19
release-notes
-
docs.github.com
/en/enterprise-server@3.16/admin/release-notes#3.16.15
release-notes
-
docs.github.com
/en/enterprise-server@3.17/admin/release-notes#3.17.12
release-notes
-
docs.github.com
/en/enterprise-server@3.18/admin/release-notes#3.18.6
release-notes
-
docs.github.com
/en/enterprise-server@3.19/admin/release-notes#3.19.3
release-notes
Sources
- CVE List CVE-2026-3306
- NVD CVE-2026-3306
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