CVE-2026-3307
Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers
- Published
- Updated
- Reserved
- Assigned by
- GitHub_P
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_PCNA (assigner) | 4.0 | Medium5.3 | 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 |
| NVDNVD · Analyzed | 4.0 | Medium5.3 | 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 |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
- affected 3.14.0 – ≤ 3.14.24
- affected 3.15.0 – ≤ 3.15.19
- affected 3.16.0 – ≤ 3.16.15
- affected 3.17.0 – ≤ 3.17.12
- affected 3.18.0 – ≤ 3.18.6
- affected 3.19.0 – ≤ 3.19.3
- affected 3.20 – ≤ 3.20.0
References (7)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.14.25 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.15.20 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.16.16 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.17.13 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.18.7 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.19.4 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.20.1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-3307)Record last updated .