CVE-2026-10585 Details
A stored cross-site scripting vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to execute arbitrary JavaScript in another user's browser by injecting a crafted payload into the title of a Discussion in the Q&A category. The AnsweredQuestionStructuredDataComponent did not escape user-controlled Discussion titles before embedding them in a  block, allowing the title to break out of the script context. The injection was escalated to a full cross-site scripting attack on GitHub Enterprise Server by leveraging JSONP callback support in the REST API to bypass the Content Security Policy. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.4, 3.19.8, 3.18.11, 3.17.17. This vulnerability was reported via the GitHub Bug Bounty program.
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Exploit prediction scoring system (EPSS) score for CVE-2026-10585
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%).
0.18 Probability of exploitation activity being observed over the next 30 days (8th percentile)
CVSS score for CVE-2026-10585
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.
5.4 Medium
Products affected by CVE-2026-10585
Enterprise Server 3.18.7
Enterprise Server 3.18.8
Enterprise Server 3.18.9
Enterprise Server 3.19.0
Enterprise Server 3.19.1
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-2026-10585 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 213 52.59%
FR 39 9.63%
CA 27 6.67%
GB 17 4.20%
AU 16 3.95%
IE 16 3.95%
DE 15 3.70%
JP 14 3.46%
SE 9 2.22%
NL 6 1.48%

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CVE-2026-10585 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 359 90.43%
Education 22 5.54%
Manufacturing 4 1.01%
Telecommunications 2 0.50%
Finance 2 0.50%
Government/Politics 2 0.50%
Utilities 2 0.50%
Business Services 2 0.50%
Healthcare/Wellness 1 0.25%
Insurance 1 0.25%

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