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CVE-2026-1355

MEDIUM

6.5

Descripcion

A Missing Authorization vulnerability was identified in GitHub Enterprise Server that allowed an attacker to upload unauthorized content to another user’s repository migration export due to a missing authorization check in the repository migration upload endpoint. By supplying the migration identifier, an attacker could overwrite or replace a victim’s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An attacker would require authentication to the victim's GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. This vulnerability was reported via the GitHub Bug Bounty program.

Detalles CVE

Puntuacion CVSS v3.16.5

SeveridadMEDIUM

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

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosLOW

Interaccion usuarioNONE

Publicado2/18/2026

Ultima modificacion2/19/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

github:enterprise_server

Debilidades (CWE)

CWE-862

Referencias

https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.23(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.18(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.14(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.11(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.5(product-cna@github.com)

https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2(product-cna@github.com)

Correlaciones IOC

Sin correlaciones registradas

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