A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with write access to any repository to read metadata from private repositories they did not have access to, including private repository owners and names, branch names, commit SHAs, commit messages, and the pushing actor. The delegated bypass endpoint resolved a rule suite directly from an attacker-supplied, encoded identifier without verifying that the requesting user could read the rule suite's repository, and because these identifiers are sequential an attacker could enumerate them across the instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program.
Metrics
Affected Vendors & Products
References
History
Fri, 17 Jul 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Github
Github enterprise Server |
|
| Vendors & Products |
Github
Github enterprise Server |
Fri, 17 Jul 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 17 Jul 2026 16:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with write access to any repository to read metadata from private repositories they did not have access to, including private repository owners and names, branch names, commit SHAs, commit messages, and the pushing actor. The delegated bypass endpoint resolved a rule suite directly from an attacker-supplied, encoded identifier without verifying that the requesting user could read the rule suite's repository, and because these identifiers are sequential an attacker could enumerate them across the instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program. | |
| Title | Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed reading private repository metadata via delegated bypass rule suites | |
| Weaknesses | CWE-862 | |
| References |
|
|
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: GitHub_P
Published:
Updated: 2026-07-17T16:55:53.667Z
Reserved: 2026-07-14T19:06:07.523Z
Link: CVE-2026-15783
Updated: 2026-07-17T16:55:49.453Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-17T18:15:16Z