DEBIAN-CVE-2026-34830

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34830
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34830.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-34830
Upstream
Published
2026-04-02T17:16:26.267Z
Modified
2026-04-03T10:05:02.512301Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Sendfile#mapaccelpath interpolates the value of the X-Accel-Mapping request header directly into a regular expression when rewriting file paths for X-Accel-Redirect. Because the header value is not escaped, an attacker who can supply X-Accel-Mapping to the backend can inject regex metacharacters and control the generated X-Accel-Redirect response header. In deployments using Rack::Sendfile with x-accel-redirect, this can allow an attacker to cause nginx to serve unintended files from configured internal locations. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

References

Affected packages

Debian:11 / ruby-rack

Package

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

Affected ranges

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

Affected versions

2.*
2.1.4-3
2.1.4-3+deb11u1
2.1.4-3+deb11u2
2.1.4-3+deb11u3
2.1.4-3+deb11u4
2.1.4-3+deb11u5
2.1.4-4
2.1.4-5
2.2.3-1
2.2.3-2
2.2.3-3
2.2.3-4
2.2.4-1
2.2.4-2
2.2.4-3
2.2.6.4-1
2.2.7-1
2.2.7-1.1
2.2.13-1~deb12u1
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34830.json"

Debian:12 / ruby-rack

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34830.json"

Debian:13 / ruby-rack

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34830.json"

Debian:14 / ruby-rack

Package

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

Affected ranges

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

Affected versions

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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34830.json"