CVE-2026-33173mediumCWE-925

CVE-2026-33173: falha de média gravidade em rails activestorage

Rails Active Storage has possible content type bypass via metadata in direct uploads

Publicada em · Atualizada em

Seguir esta CVE+ Monitorar activestorage+ Monitorar rails

Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.

13Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 5.3epss 0.4%
Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, `DirectUploadsController` accepts arbitrary metadata from the client and persists it on the blob. Because internal flags like `identified` and `analyzed` are stored in the same metadata hash, a direct-upload client can set these flags to skip MIME detection and analysis. This allows an attacker to upload arbitrary content while claiming a safe `content_type`, bypassing any validations that rely on Active Storage's automatic content type identification. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Produtos afetados
rails · activestorage
CVEs relacionadas — rails activestorage

No mesmo produto, das mais perigosas para as menos.

CVE-2026-33202MEDIUMRails Active Storage has possible glob injection in its DiskServiceEPSS 0.7%CVE-2026-33174MEDIUMRails Active Storage has a possible DoS vulnerability when in proxy mode via Range requestsEPSS 0.6%CVE-2026-33195HIGHRails Active Storage has possible Path Traversal in DiskServiceEPSS 0.6%CVE-2026-33658LOWRails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requestsEPSS 0.5%