CVE-2026-49140
Gravedad CVSS v4.0:
MEDIA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
01/06/2026
Última modificación:
14/07/2026
Descripción
*** Pendiente de traducción *** Nanobot prior to version 0.2.1 contains a denial of service vulnerability in the Matrix channel media download handler that allows authenticated room members to exhaust process memory and bandwidth by sending media events with missing or invalid size metadata. Attackers can send multiple concurrent Matrix media events with omitted or invalid declared sizes to trigger simultaneous large media downloads that fully materialize response bodies before post-download rejection, consuming process resources until service degradation occurs.
Impacto
Puntuación base 4.0
5.30
Gravedad 4.0
MEDIA
Puntuación base 3.x
4.30
Gravedad 3.x
MEDIA
Referencias a soluciones, herramientas e información
- https://github.com/HKUDS/nanobot/commit/1d4000560dfff1acb83f5c5ca8ef3ab1f092bd14
- https://github.com/HKUDS/nanobot/pull/4106
- https://github.com/HKUDS/nanobot/releases/tag/v0.2.1
- https://www.vulncheck.com/advisories/nanobot-denial-of-service-via-matrix-media-download-handler
- https://github.com/HKUDS/nanobot/pull/4106



