CVE-2026-8606 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2026-8606
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.06 Probability of exploitation activity being observed over the next 30 days (19th percentile)
CVSS score for CVE-2026-8606
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.9 Medium
Products affected by CVE-2026-8606
Enterprise Server 3.13.4
Enterprise Server 3.14.8
Enterprise Server 3.6.2
Enterprise Server 3.8.2
Enterprise Server 3.13.14
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-8606 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 65 63.73%
FR 18 17.65%
CA 3 2.94%
GB 3 2.94%
IE 3 2.94%
SE 3 2.94%
AU 1 0.98%
BE 1 0.98%
GH 1 0.98%
HK 1 0.98%

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CVE-2026-8606 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 88 90.72%
Education 6 6.19%
Telecommunications 2 2.06%
Finance 1 1.03%

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