MediumFix available
rails — security advisory
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.
- Products
- rails
- Affected versions
- 2:7.2.2.1+dfsg-7, 2:7.2.2.2+dfsg-1, 2:7.2.2.2+dfsg-2, 2:7.2.2.2+dfsg-2~deb13u1, 2:7.2.2.2+dfsg-2~deb13u2, 2:7.2.3+dfsg-1, 2:7.2.3+dfsg-2, 2:7.2.3+dfsg-3
- Fixed versions
- 2:7.2.2.2+dfsg-2~deb13u2, 2:7.2.3.1+dfsg-1
- CVEs
- CVE-2026-33658
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:10 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-33658
rails
Fixed versions: 2:7.2.2.2+dfsg-2~deb13u2
rails
Fixed versions: 2:7.2.3.1+dfsg-1
Complete source record
{
"id": "a85ba18bf0a7c4690757295464a959a5a3be33a075d6bde11ff33f8eeb3277c7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-33658",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-33658",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-33658",
"products": [
{
"name": {
"value": "rails",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:7.2.2.2+dfsg-2~deb13u2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "2:7.2.2.1+dfsg-7",
"evidence": "/affected/0/versions"
},
{
"value": "2:7.2.2.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:7.2.2.2+dfsg-2~deb13u1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "rails",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:7.2.3.1+dfsg-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "2:7.2.2.1+dfsg-7",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.2.2+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.2.2+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.2.2+dfsg-2~deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.2.2+dfsg-2~deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.3+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.3+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "2:7.2.3+dfsg-3",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-33658",
"aliases": [
"DEBIAN-CVE-2026-33658"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:7.2.2.2+dfsg-2~deb13u2"
}
]
}
],
"package": {
"name": "rails",
"purl": "pkg:deb/debian/rails?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2:7.2.2.1+dfsg-7",
"2:7.2.2.2+dfsg-1",
"2:7.2.2.2+dfsg-2~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33658.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:7.2.3.1+dfsg-1"
}
]
}
],
"package": {
"name": "rails",
"purl": "pkg:deb/debian/rails?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2:7.2.2.1+dfsg-7",
"2:7.2.2.2+dfsg-1",
"2:7.2.2.2+dfsg-2",
"2:7.2.2.2+dfsg-2~deb13u1",
"2:7.2.2.2+dfsg-2~deb13u2",
"2:7.2.3+dfsg-1",
"2:7.2.3+dfsg-2",
"2:7.2.3+dfsg-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33658.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-08T15:00:07.645392987Z",
"provider": "osv",
"upstream": [
"CVE-2026-33658"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-33658"
]
},
"related_cves": [
{
"value": "CVE-2026-33658",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 99704,
"published_at": "2026-03-26T22:16:29.387+00:00"
}