CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, при специфични условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an attacker to extract sensitive environment variables from the instance through a timing side-channel attack against the notebook rendering service. When private mode was disabled, the notebook viewer followed HTTP redirects without revalidating the destination host, enabling an unauthenticated SSRF to internal services. By chaining this with regex filter queries against an internal API and measuring response time differences, an attacker could infer secret values character by character. Exploitation required that private mode be disabled and that the attacker be able to chain the instance's open redirect endpoint through an external redirect to reach internal services. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.26, 3.15.21, 3.16.17, 3.17.14, 3.18.8, 3.19.5, and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
Засегнати продукти
- GitHub Enterprise Server: 3.14.0 преди 3.14.26; 3.15.0 преди 3.15.21; 3.16.0 преди 3.16.17; 3.17.0 преди 3.17.14; 3.18.0 преди 3.18.8; 3.19.0 преди 3.19.5; 3.20.0 преди 3.20.1
Вид слабост
История
- 21 април 2026 Публикувано
Други уязвимости в GitHub Enterprise Server
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-5921
- https://nvd.nist.gov/vuln/detail/CVE-2026-5921
- https://docs.github.com/en/[email protected]/admin/release-notes#3.14.26
- https://docs.github.com/en/[email protected]/admin/release-notes#3.15.21
- https://docs.github.com/en/[email protected]/admin/release-notes#3.16.17
- https://docs.github.com/en/[email protected]/admin/release-notes#3.17.14
- https://docs.github.com/en/[email protected]/admin/release-notes#3.18.8
- https://docs.github.com/en/[email protected]/admin/release-notes#3.19.5
- https://docs.github.com/en/[email protected]/admin/release-notes#3.20.1