CVE-2020-10517: GitHub

Medium severity, CVSS 4.3. EPSS: 1.1% chance of exploitation in the next 30 days.

An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to determine the names of unauthorized private repositories given their numerical IDs. This vulnerability did not allow unauthorized access to any repository content besides the name. This vulnerability affected all versions of GitHub Enterprise Server prior to 2.22 and was fixed in versions 2.21.6, 2.20.15, and 2.19.21. This vulnerability was reported via the GitHub Bug Bounty program.

Affected products

• GitHub GitHub: before 2.19.21 (fixed in 2.19.21); from 2.20.0, before 2.20.15 (fixed in 2.20.15); from 2.21.0, before 2.21.6 (fixed in 2.21.6)

Published 2020-08-27. Last modified 2026-06-17.