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CVE-2026-3306

Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access

Published: Mar 10, 2026Updated: Mar 12, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.3%
Top 76.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-639

Affected Products

enterprise servergithubDevTools & CI
Enterprise ServerGitHubDevTools & CI
githubcommercialUSDevTools & CIaka github

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.24
docs.github.com
https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.19
docs.github.com
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15
docs.github.com
and 3 more references View all →

Timeline

Published
Mar 10, 2026
Last Updated
Mar 12, 2026

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