DEBIAN-CVE-2026-34826
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.get_byte_ranges parses the HTTP Range header without limiting the number of individual byte ranges. Although the existing fix for CVE-2024-26141 rejects ranges whose total byte coverage exceeds the file size, it does not restrict the count of ranges. An attacker can supply many small overlapping ranges such as 0-0,0-0,0-0,... to trigger disproportionate CPU, memory, I/O, and bandwidth consumption per request. This results in a denial of service condition in Rack file-serving paths that process multipart byte range responses. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
DEBIAN-CVE-2026-34826
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-34826
ruby-rack
Source reference: /affected/0/package/name
- Affected versions
- 2.2.13-1~deb12u1
Source reference:
/affected/0/versions2.2.20-0+deb12u1Source reference:
/affected/0/versions2.2.22-0+deb12u1Source reference:
/affected/0/versions2.2.6.4-1Source reference:
/affected/0/versions2.2.6.4-1+deb12u1Source reference:
/affected/0/versions2.2.7-1Source reference:
/affected/0/versions2.2.7-1.1Source reference:
/affected/0/versions - Fixed versions
- 2.2.22-0+deb12u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
ruby-rack
Source reference: /affected/1/package/name
- Affected versions
- 3.1.16-0.1
Source reference:
/affected/1/versions3.1.18-1Source reference:
/affected/1/versions3.1.18-1~deb13u1Source reference:
/affected/1/versions3.1.20-0+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 3.1.20-0+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
ruby-rack
Source reference: /affected/2/package/name
- Affected versions
- 3.1.16-0.1
Source reference:
/affected/2/versions3.1.18-1Source reference:
/affected/2/versions3.1.18-1~deb13u1Source reference:
/affected/2/versions3.2.4-1Source reference:
/affected/2/versions3.2.5-1Source reference:
/affected/2/versions3.2.5-2Source reference:
/affected/2/versions3.2.6-1Source reference:
/affected/2/versions - Fixed versions
- 3.2.6-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.22-0+deb12u2"
}
]
}
],
"package": {
"name": "ruby-rack",
"purl": "pkg:deb/debian/ruby-rack?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.2.13-1~deb12u1",
"2.2.20-0+deb12u1",
"2.2.22-0+deb12u1",
"2.2.6.4-1",
"2.2.6.4-1+deb12u1",
"2.2.7-1",
"2.2.7-1.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34826.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.20-0+deb13u2"
}
]
}
],
"package": {
"name": "ruby-rack",
"purl": "pkg:deb/debian/ruby-rack?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.1.16-0.1",
"3.1.18-1",
"3.1.18-1~deb13u1",
"3.1.20-0+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34826.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.2.6-2"
}
]
}
],
"package": {
"name": "ruby-rack",
"purl": "pkg:deb/debian/ruby-rack?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.1.16-0.1",
"3.1.18-1",
"3.1.18-1~deb13u1",
"3.2.4-1",
"3.2.5-1",
"3.2.5-2",
"3.2.6-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34826.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56399 · Revision 1
- Added to Heist Feed
- Publisher date