DEBIAN-CVE-2026-125109

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Source
https://security-tracker.debian.org/tracker/CVE-2026-125109
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125109.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-125109
Upstream
Published
2026-11-09T22:18:42Z
Modified
2026-11-10T13:00:06Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Rack is a modular Ruby web server interface. From 3.0 until 3.1.23 and 3.2.8, Rack::Request#host_with_port, #base_url, and #url can return an attacker-controlled invalid authority from Host, X-Forwarded-Host, or Forwarded: host= verbatim. Applications without an independent host allowlist that use these methods for absolute URLs, redirects, or origin-dependent checks can emit attacker-chosen delimiters, enabling redirect manipulation, string-based allowlist bypass, or unescaped markup reflection. Rails overrides these methods and is not expected to be affected. This issue is fixed in versions 3.1.23 and 3.2.8.

References

Affected packages

Debian:12 / ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/debian/ruby-rack?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.6.4-1
2.2.6.4-1+deb12u1
2.2.7-1
2.2.7-1.1
2.2.13-1~deb12u1
2.2.20-0+deb12u1
2.2.22-0+deb12u1
2.2.22-0+deb12u2
3.*
3.0.0-1
3.0.8-1
3.0.8-2
3.0.8-3
3.0.8-4
3.1.9-1~exp1
3.1.9-2
3.1.12-1
3.1.12-2~exp1
3.1.16-0.1
3.1.18-1~deb13u1
3.1.18-1
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1
3.2.6-2
3.2.6-3
3.2.7-1
3.2.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125109.json"

Debian:13 / ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/debian/ruby-rack?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.16-0.1
3.1.18-1~deb13u1
3.1.18-1
3.1.20-0+deb13u1
3.1.20-0+deb13u2
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1
3.2.6-2
3.2.6-3
3.2.7-1
3.2.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125109.json"

Debian:14 / ruby-rack

Package

Name
ruby-rack
Purl
pkg:deb/debian/ruby-rack?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.8-1

Affected versions

3.*
3.1.16-0.1
3.1.18-1~deb13u1
3.1.18-1
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1
3.2.6-2
3.2.6-3
3.2.7-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125109.json"