CVE-2026-3307
published 2026-04-21CVE-2026-3307: An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the…
PriorityP418low2.7CVSS 3.1
AVNACLPRHUINSUCNILAN
EPSS
0.27%
18.6th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github | enterprise_server | < 3.14.26 | 3.14.26 |
| github | enterprise_server | — | — |
| github | enterprise_server | 3.14.0 – 3.14.24 | — |
| github | enterprise_server | >= 3.15.0 < 3.15.21 | 3.15.21 |
| github | enterprise_server | 3.15.0 – 3.15.19 | — |
| github | enterprise_server | >= 3.16.0 < 3.16.17 | 3.16.17 |
| github | enterprise_server | 3.16.0 – 3.16.15 | — |
| github | enterprise_server | >= 3.17.0 < 3.17.14 | 3.17.14 |
| github | enterprise_server | 3.17.0 – 3.17.12 | — |
| github | enterprise_server | >= 3.18.0 < 3.18.8 | 3.18.8 |
| github | enterprise_server | 3.18.0 – 3.18.6 | — |
| github | enterprise_server | >= 3.19.0 < 3.19.5 | 3.19.5 |
| github | enterprise_server | 3.19.0 – 3.19.3 | — |
| github | enterprise_server | 3.20 – 3.20.0 | — |
CVSS provenance
nvdv3.12.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
nvdv4.05.3MEDIUMCVSS: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
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https://docs.github.com/en/[email protected]/admin/release-notes#3.14.25https://docs.github.com/en/[email protected]/admin/release-notes#3.15.20https://docs.github.com/en/[email protected]/admin/release-notes#3.16.16https://docs.github.com/en/[email protected]/admin/release-notes#3.17.13https://docs.github.com/en/[email protected]/admin/release-notes#3.18.7https://docs.github.com/en/[email protected]/admin/release-notes#3.19.4https://docs.github.com/en/[email protected]/admin/release-notes#3.20.1
2026-04-21
Published