CVE-2026-2266

MEDIUM

5.4

Descripcion

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed DOM-based cross-site scripting via task list content. The task list content extraction logic did not properly re-encode browser-decoded text nodes before rendering, allowing user-supplied HTML to be injected into the page. An authenticated attacker could craft malicious task list items in issues or pull requests to execute arbitrary scripts in the context of another user's browser session. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.18.6 and 3.19.3. This vulnerability was reported via the GitHub Bug Bounty program.

Detalles CVE

Puntuacion CVSS v3.15.4

SeveridadMEDIUM

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosLOW

Interaccion usuarioREQUIRED

Publicado3/10/2026

Ultima modificacion3/12/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

github:enterprise_server

Debilidades (CWE)

CWE-79

Referencias

https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3(product-cna@github.com)

Correlaciones IOC

Sin correlaciones registradas

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