CVE-2020-10516: GitHub

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

An improper access control vulnerability was identified in the GitHub Enterprise Server API that allowed an organization member to escalate permissions and gain access to unauthorized repositories within an organization. This vulnerability affected all versions of GitHub Enterprise Server prior to 2.21 and was fixed in 2.20.9, 2.19.15, and 2.18.20. This vulnerability was reported via the GitHub Bug Bounty program.

Affected products

• GitHub GitHub: from 2.18.0, before 2.18.20 (fixed in 2.18.20); from 2.19.0, before 2.19.15 (fixed in 2.19.15); from 2.20.0, before 2.20.9 (fixed in 2.20.9)

Published 2020-06-03. Last modified 2026-06-17.