CVE-2026-77912: GitHub Enterprise Server, XSS

7.4

CVSS 4.0

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, при специфични условия, с обикновен потребителски вход и след действие от потребителя.

CVE радар: още уязвимости от този вид

Експлоатация: няма данни за експлоатация
Атаката не може да се автоматизира

Описание

Оригинално описание

A stored cross-site scripting (XSS) vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without re-sanitizing the result. Crafted Markdown could abuse same-origin JavaScript gadgets to bypass Content Security Policy and gain control of the page DOM when viewed by another user. Successful exploitation could allow an attacker to read content visible to the victim, extract embedded CSRF tokens, perform state-changing actions as the victim, and exfiltrate data through same-origin writes. The payload could also propagate to repositories and organizations where the victim had write access. This vulnerability affected supported GitHub Enterprise Server releases in the 3.17, 3.18, 3.19, 3.20, 3.21, and 3.22 series and was fixed in versions 3.22.1, 3.21.6, 3.20.8, 3.19.12, 3.18.15, and 3.17.21. This vulnerability was reported via the GitHub Bug Bounty program.

Засегнати продукти

GitHub Enterprise Server: 3.17.0 преди 3.17.*; 3.18.0 преди 3.18.*; 3.19.0 преди 3.19.*; 3.20.0 преди 3.20.*; 3.21.0 преди 3.21.*; 3.22.0 преди 3.22.*

CVE-2026-77912: GitHub Enterprise Server, XSS

Описание

Засегнати продукти

Вид слабост

История

Други уязвимости в GitHub Enterprise Server

Първоизточници