DEBIAN-CVE-2026-34786

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34786
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34786.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-34786
Upstream
Published
2026-04-02T17:16:25.030Z
Modified
2026-04-03T10:04:52.022327Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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::Static#applicablerules evaluates several headerrules types against the raw URL-encoded PATHINFO, while the underlying file-serving path is decoded before the file is served. As a result, a request for a URL-encoded variant of a static path can serve the same file without the headers that headerrules were intended to apply. In deployments that rely on Rack::Static to attach security-relevant response headers to static content, this can allow an attacker to bypass those headers by requesting an encoded form of the path. 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-2026-34786.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-2026-34786.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-2026-34786.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-2026-34786.json"