CVE-2026-42181
Gravedad CVSS v3.1:
MEDIA
Tipo:
CWE-918
Falsificación de solicitud en servidor (SSRF)
Fecha de publicación:
08/05/2026
Última modificación:
12/05/2026
Descripción
*** Pendiente de traducción *** Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP ranges, the extracted og:image URL is not subject to the same restriction. As a result, an authenticated low-privileged user can submit an attacker-controlled public page whose Open Graph image points to an internal image endpoint. Lemmy will fetch that internal image server-side and store a local thumbnail that can then be served back to users. This issue has been patched in version 0.19.18.
Impacto
Puntuación base 3.x
6.50
Gravedad 3.x
MEDIA



