5.3

CVE-2026-15783

Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed reading private repository metadata via delegated bypass rule suites

A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with write access to any repository to read metadata from private repositories they did not have access to, including private repository owners and names, branch names, commit SHAs, commit messages, and the pushing actor. The delegated bypass endpoint resolved a rule suite directly from an attacker-supplied, encoded identifier without verifying that the requesting user could read the rule suite's repository, and because these identifiers are sequential an attacker could enumerate them across the instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerGitHub
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Produkt Enterprise Server
Default Statusaffected
Version <= 3.17.17
Version 3.17.0
Status affected
Version <= 3.18.11
Version 3.18.0
Status affected
Version <= 3.19.8
Version 3.19.0
Status affected
Version <= 3.20.4
Version 3.20.0
Status affected
Version <= 3.21.2
Version 3.21.0
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.27% 0.192
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
product-cna@github.com 5.3 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-862 Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3