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CVE-2026-75101

📛 CVE Title

Authorization bypass vulnerability in GitHub Enterprise Server allowed reading of private pull request diffs and patches via repository name collision

⬇ Download JSON

Description

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to the repository name and pull request number rather than to a globally unique repository identifier, so an attacker who created a repository and pull request matching a target's repository name and pull request number could use a token for their own repository to retrieve the private pull request's contents. Exploitation required the attacker to know the target repository's name and a valid pull request number. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.21, 3.18.15, 3.19.12, 3.20.8, and 3.21.6. This vulnerability was reported via the GitHub Bug Bounty program.

Overview

State
PUBLISHED
Assigner (CNA)
GitHub_P
CVSS severity
MEDIUM
CVSS score
CVSS 6.0 / 10 6.0 6.0 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Effective score
6.0 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-639
Reserved
2026-08-17
Published
2026-09-22 20:43 UTC
Last updated
2026-09-22 20:43 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/75xxx/CVE-2026-75101.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-09-22 21:17:31 UTC
NVD last modified
2026-09-22 21:17:31 UTC

NVD / KEV / EPSS data refreshed 2026-09-23 02:45 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-84874
Assigner
GitHub_P
Published
Sep 22, 2026, 8:43:59 PM
Updated
Sep 22, 2026, 8:43:59 PM
EUVD base score (CVSS 4.0)
6.0 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EUVD-reported EPSS
0.0000
Vendors
GitHub
Products
Enterprise Server (3.20.0 <3.20.*)
Enterprise Server (3.21.0 <3.21.*)
Enterprise Server (3.19.0 <3.19.*)
Enterprise Server (3.17.0 <3.17.*)
Enterprise Server (3.18.0 <3.18.*)
Aliases
GHSA-843p-hf47-6r9f

ENISA description: An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to the repository name and pull request number rather than to a globally unique repository identifier, so an attacker who created a repository and pull request matching a target's repository name and pull request number could use a token for their own repository to retrieve the private pull request's contents. Exploitation required the attacker to know the target repository's name and a valid pull request number. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.21, 3.18.15, 3.19.12, 3.20.8, and 3.21.6. This vulnerability was reported via the GitHub Bug Bounty program.

EUVD references (5)

Affected products (1)
VendorProductVersionsPlatforms
GitHub Enterprise Server 3.17.0 (affected), 3.18.0 (affected), 3.19.0 (affected), 3.20.0 (affected), 3.21.0 (affected) —

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (10)

  • Update Software, Mitigation M1051 - Enterprise | MITRE ATT&CK®
    web:attack.mitre.org

    This mitigation can be implemented through the following measures: Regular Operating System Updates Implementation: Apply the latest Windows security updates monthly using WSUS (Windows Server Update Services) or a similar patch management solution. Configure systems to check for updates automatically and schedule reboots during maintenance ...

    2026-09-23 15:45 UTC
  • CVE-2026-75101 - Authorization bypass vulnerability in GitHub ...
    web:cvefeed.io

    The following list is the news that have been mention CVE-2026-75101 vulnerability anywhere in the article. Results are limited to the first 20 news articles due to potential performance issues. The following table lists the changes that have been made to the CVE-2026-75101 vulnerability over time.

    2026-09-23 15:45 UTC
  • CVE-2026-75101: GitHub Enterprise Server Vulnerability | CVETodo
    web:cvetodo.com

    CVE-2026-75101 is a CVSS 6 medium-severity vulnerability in Enterprise Server. Full technical analysis, mitigations , and exploit status — updated in real time.

    2026-09-23 15:45 UTC
  • CVE-2026-75101 - Exploits & Severity - Feedly
    web:feedly.com

    Mitigation Upgrade GitHub Enterprise Server to a patched version (3.17.21, 3.18.15, 3.19.12, 3.20.8, or 3.21.6 or later). If upgrading is not immediately possible, restrict access to pull request diff and patch endpoints to authorized users only and monitor access logs for suspicious token usage patterns.

    2026-09-23 15:45 UTC
  • Cisco Advance Notification for Publication of September 16, 2026 ...
    web:sec.cloudapps.cisco.com

    On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

    2026-09-23 15:45 UTC
  • Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva
    web:senserva.com

    Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

    2026-09-23 15:45 UTC
  • August's Patch Tuesday is a monster: 751 fixes, with an exploited ...
    web:www.computerworld.com

    August's Patch Tuesday is a big one: 751 fixes, an exploited WinSock flaw and plenty of critical Windows, Office and Exchange issues.

    2026-09-23 15:45 UTC
  • CVE-2026-75101 - Detail CVSS, EPSS & CISA Kev | CVE Find
    web:www.cvefind.com

    Full details for CVE-2026-75101 : technical description, impact, CVSS/EPSS scores, linked CWE, CAPEC, affected CPEs, disclosure date, and mitigation options.

    2026-09-23 15:45 UTC
  • Oracle Critical Patch Update Advisory - July 2026
    web:www.oracle.com

    This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-09-23 15:45 UTC
  • CVE-2026-75101: GitHub Enterprise Server: An authorization ... - Rapid7
    web:www.rapid7.com

    CVE-2026-75101 : GitHub Enterprise Server: An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of…. View severity, references, and remediation details from Rapid7.

    2026-09-23 15:45 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-75101.json.

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