| Name | CVE-2026-33658 |
| Description | 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 Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6546-1 |
| Debian Bugs | 1132035 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| rails (PTS) | bookworm | 2:6.1.7.10+dfsg-1~deb12u2 | fixed |
| bookworm (security) | 2:6.1.7.10+dfsg-1~deb12u3 | fixed | |
| trixie | 2:7.2.2.2+dfsg-2~deb13u1 | vulnerable | |
| trixie (security) | 2:7.2.2.2+dfsg-2~deb13u2 | fixed | |
| forky | 2:7.2.4+dfsg-1 | fixed | |
| sid | 2:7.2.4+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| rails | source | bookworm | (not affected) | |||
| rails | source | trixie | 2:7.2.2.2+dfsg-2~deb13u2 | DSA-6546-1 | ||
| rails | source | (unstable) | 2:7.2.3.1+dfsg-1 | 1132035 |
[bookworm] - rails <not-affected> (Vulnerable code introduced later; ActiveStorage::Streaming proxy Range handling added in 7.0)
[bullseye] - rails <postponed> (Minor issue, DoS)
https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
Fixed by: https://github.com/rails/rails/commit/85ec5b1e00d3197d8c69a5e622e1b398a1b10b06 (v8.1.2.1)
Fixed by: https://github.com/rails/rails/commit/d7da4ef03f99035fba5add8828646f1e9173549c (v8.0.4.1)
Fixed by: https://github.com/rails/rails/commit/b8a1665824a43d71cd6406cf9adcae842ceb1c22 (v7.2.3.1)