Vulnerability record · CVE-2020-10517 · published 27 August 2020

CVE-2020-10517: Github improper authorization vulnerability

Github · Github

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.

4.3 CVSS 3.1 Medium EPSS 1.1% · top 37.1% CWE-285 · Improper authorization

4.3CVSS 3.1 base score, v2 4.0

1.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Github Github

References

Link	Tags
https://enterprise.github.com/releases/2.19.21/notes	Release NotesVendor Advisory
https://enterprise.github.com/releases/2.20.15/notes	Release NotesVendor Advisory
https://enterprise.github.com/releases/2.21.6/notes	Release NotesVendor Advisory
https://enterprise.github.com/releases/2.19.21/notes	Release NotesVendor Advisory
https://enterprise.github.com/releases/2.20.15/notes	Release NotesVendor Advisory
https://enterprise.github.com/releases/2.21.6/notes	Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-10517), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.