CVE-2026-33174mediumCWE-789

CVE-2026-33174: fallo de gravedad media en rails activestorage

Rails Active Storage has a possible DoS vulnerability when in proxy mode via Range requests

Publicada el · Actualizada el

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 6.6epss 0.7%
probabilidad de explotación
0.7%top 48% de las CVE
explotación observada
noninguna fuente lo reporta
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, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. 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:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Productos afectados
rails · activestorage
CVEs relacionadas — rails activestorage

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-33202MEDIUMRails Active Storage has possible glob injection in its DiskServiceEPSS 0.8%CVE-2026-33195HIGHRails Active Storage has possible Path Traversal in DiskServiceEPSS 0.7%CVE-2026-33658LOWRails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requestsEPSS 0.6%CVE-2026-33173MEDIUMRails Active Storage has possible content type bypass via metadata in direct uploadsEPSS 0.4%
Referencias
https://github.com/rails/rails/commit/2cd933c366b777f873d4d590127da2f4a25e4ba5https://github.com/rails/rails/commit/42012eaaa88dfc7d0030161b2bc8074a7bbce92ahttps://github.com/rails/rails/commit/8159a9c3de3f27a2bcf2866b8bf9ceb9075e229bhttps://github.com/rails/rails/releases/tag/v7.2.3.1https://github.com/rails/rails/releases/tag/v8.0.4.1https://github.com/rails/rails/releases/tag/v8.1.2.1https://github.com/rails/rails/security/advisories/GHSA-r46p-8f7g-vvvg