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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-3307 Detail

Description

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc. (Products Only)
CVSS-B 5.3 MEDIUM
Vector:  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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://docs.github.com/en/[email protected]/admin/release-notes#3.14.25 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.15.20 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.16.16 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.13 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.18.7 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.19.4 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 
https://docs.github.com/en/[email protected]/admin/release-notes#3.20.1 GitHub, Inc. (Products Only) Release Notes  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-639 Authorization Bypass Through User-Controlled Key GitHub, Inc. (Products Only)  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-3307
NVD Published Date:
04/21/2026
NVD Last Modified:
06/17/2026
Source:
GitHub, Inc. (Products Only)