CVE-2026-9132A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to read source code from private repositories they did not have access to.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to read source code from private repositories they did not have access to. The Copilot pull request description diff summary endpoint accepted a cross-repository comparison range and rendered the resulting diff without verifying that the requesting user was authorized to view the target repository. Exploitation required an authenticated account on the instance with read access to at least one repository to use as the comparison base. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, and 3.20.4. This vulnerability was reported via the GitHub Bug Bounty program.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
github enterprise_server github:enterprise_server | before 3.17.17; from 3.18.0 before 3.18.11; from 3.19.0 before 3.19.8; from 3.20.0 before 3.20.4 | NVD |
References
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17-featuresrelease-notes
- https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11-featuresrelease-notes
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8-featuresrelease-notes
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4-featuresrelease-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.