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 <script type="application/ld+json"> 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, 3.16.20. This vulnerability was reported via the GitHub Bug Bounty program.
References
Configurations
Configuration 1 (hide)
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History
02 Jul 2026, 15:33
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.4 |
| First Time |
Github enterprise Server
Github |
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| References | () https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.20 - Release Notes | |
| References | () https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17 - Release Notes | |
| References | () https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11 - Release Notes | |
| References | () https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8 - Release Notes | |
| References | () https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4 - Release Notes |
01 Jul 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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| Summary | (en) 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 <script type="application/ld+json"> 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, 3.16.20. This vulnerability was reported via the GitHub Bug Bounty program. |
01 Jul 2026, 11:16
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) 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 <script type="application/ld+json"> 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. |
30 Jun 2026, 23:16
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) 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 <script type="application/ld+json"> 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. |
30 Jun 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-30 22:16
Updated : 2026-07-02 15:33
NVD link : CVE-2026-10585
Mitre link : CVE-2026-10585
CVE.ORG link : CVE-2026-10585
JSON object : View
Products Affected
github
- enterprise_server
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')