UBUNTU-CVE-2026-54163

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Source
https://ubuntu.com/security/CVE-2026-54163
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-54163
Upstream
Published
2026-07-17T21:17:00Z
Modified
2026-07-29T10:18:49Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

secure_headers manages application of security headers with many safe defaults. Prior to 7.3.0, secure_headers builds the Content-Security-Policy value by stitching directives with ; separators, and build_sandbox_list_directive, build_media_type_list_directive, and build_report_to_directive interpolate caller-supplied strings without scrubbing ;, \r, or \n. When untrusted input reaches SecureHeaders.override_content_security_policy_directives or append APIs for :sandbox, :plugin_types, or :report_to, an attacker can inject a CSP directive such as script-src 'unsafe-inline' * before the legitimate script-src, enabling XSS reachability through these sinks or CSP report exfiltration. This issue is fixed in version 7.3.0.

References

Affected packages

Ubuntu:18.04:LTS / ruby-secure-headers

Package

Name
ruby-secure-headers
Purl
pkg:deb/ubuntu/ruby-secure-headers?arch=source&distro=bionic

Affected ranges

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

Affected versions

3.*
3.7.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-secure-headers",
            "binary_version": "3.7.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json"

Ubuntu:20.04:LTS / ruby-secure-headers

Package

Name
ruby-secure-headers
Purl
pkg:deb/ubuntu/ruby-secure-headers?arch=source&distro=focal

Affected ranges

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

Affected versions

6.*
6.0.0-1
6.1.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-secure-headers",
            "binary_version": "6.1.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json"

Ubuntu:22.04:LTS / ruby-secure-headers

Package

Name
ruby-secure-headers
Purl
pkg:deb/ubuntu/ruby-secure-headers?arch=source&distro=jammy

Affected ranges

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

Affected versions

6.*
6.3.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-secure-headers",
            "binary_version": "6.3.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json"

Ubuntu:24.04:LTS / ruby-secure-headers

Package

Name
ruby-secure-headers
Purl
pkg:deb/ubuntu/ruby-secure-headers?arch=source&distro=noble

Affected ranges

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

Affected versions

6.*
6.3.2-1
6.3.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-secure-headers",
            "binary_version": "6.3.2-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json"

Ubuntu:26.04:LTS / ruby-secure-headers

Package

Name
ruby-secure-headers
Purl
pkg:deb/ubuntu/ruby-secure-headers?arch=source&distro=resolute

Affected ranges

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

Affected versions

6.*
6.3.2-2
7.*
7.1.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ruby-secure-headers",
            "binary_version": "7.1.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54163.json"