UBUNTU-CVE-2026-13601

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-13601
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-13601
Upstream
Published
2026-06-29T10:16:00Z
Modified
2026-07-09T17:15:27.575018523Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in Yelp due to an overly permissive Content Security Policy (CSP) implementation provided by yelp-xsl. A malicious Flatpak application can open crafted help content through the OpenURI portal. By embedding an untrusted CSS stylesheet within a structured SVG document, attacker-controlled content can bypass Flatpak's intended sandbox isolation, allowing Yelp to evaluate local XML inclusions and disclose arbitrary user-readable host files through remote CSS resource requests. This may result in the unauthorized disclosure of sensitive information.

References

Affected packages

Ubuntu:16.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=xenial

Affected ranges

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

Affected versions

3.*
3.16.1-1ubuntu1
3.16.1-1ubuntu2
3.18.1-1ubuntu2
3.18.1-1ubuntu3
3.18.1-1ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "3.18.1-1ubuntu4"
        },
        {
            "binary_name": "yelp",
            "binary_version": "3.18.1-1ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:18.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=bionic

Affected ranges

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

Affected versions

3.*
3.26.0-1ubuntu1
3.26.0-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "3.26.0-1ubuntu2"
        },
        {
            "binary_name": "yelp",
            "binary_version": "3.26.0-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:20.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.34.0-1
3.36.0-1
3.36.2-0ubuntu1
3.36.2-0ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "3.36.2-0ubuntu1.1"
        },
        {
            "binary_name": "yelp",
            "binary_version": "3.36.2-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:22.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=jammy

Affected ranges

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

Affected versions

40.*
40.stable-1build1
41.*
41.1-1
41.2-1
Other
42~beta-2
42.*
42.0-1
42.1-1
42.1-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "42.1-1ubuntu0.1"
        },
        {
            "binary_name": "yelp",
            "binary_version": "42.1-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:24.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=noble

Affected ranges

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

Affected versions

42.*
42.2-1
42.2-1build1
42.2-1build2
42.2-1ubuntu0.24.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "42.2-1ubuntu0.24.04.1"
        },
        {
            "binary_name": "yelp",
            "binary_version": "42.2-1ubuntu0.24.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:25.10
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=questing

Affected ranges

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

Affected versions

42.*
42.2-2
42.2-4
42.2-4build1
42.3-1
42.3-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp0",
            "binary_version": "42.3-3ubuntu1"
        },
        {
            "binary_name": "yelp",
            "binary_version": "42.3-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"
Ubuntu:26.04:LTS
yelp

Package

Name
yelp
Purl
pkg:deb/ubuntu/yelp?arch=source&distro=resolute

Affected ranges

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

Affected versions

42.*
42.3-3ubuntu1
49.*
49.0-4
49.0-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyelp-1-0",
            "binary_version": "49.0-5"
        },
        {
            "binary_name": "yelp",
            "binary_version": "49.0-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13601.json"