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CVE-2026-8606

Server-Side Request Forgery in GitHub Enterprise Server via Advisory Package URL Endpoint

A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an attacker to cause the server to issue HTTP requests to internal services via the security advisories package lookup feature. By directing requests to an internal management service and measuring response timing, an attacker could infer the values of sensitive environment variables, including signing secrets and private keys. Exploitation required GitHub Packages to be enabled; on instances not running in private mode the vulnerability was exploitable without authentication, otherwise any authenticated user could exploit it. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21.1 and was fixed in versions 3.20.3, 3.19.7, 3.18.10, 3.17.16, and 3.16.19. This vulnerability was reported via the GitHub Bug Bounty program.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Github ≫ Enterprise Server Version < 3.16.19
Github ≫ Enterprise Server Version >= 3.17.0 < 3.17.16
Github ≫ Enterprise Server Version >= 3.18.0 < 3.18.10
Github ≫ Enterprise Server Version >= 3.19.0 < 3.19.7
Github ≫ Enterprise Server Version >= 3.20.0 < 3.20.3
Github ≫ Enterprise Server Version3.21.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.39% 0.302
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
product-cna@github.com 7 0 0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/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-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.19
Product
Release Notes
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.16
Product
Release Notes
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.10
Product
Release Notes
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.7
Product
Release Notes
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.3
Product
Release Notes
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.1
Product
Release Notes