UBUNTU-CVE-2026-34475

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Source
https://ubuntu.com/security/CVE-2026-34475
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34475
Upstream
  • CVE-2026-34475
Published
2026-03-27T20:16:00Z
Modified
2026-05-20T16:25:33.675991042Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

References

Affected packages

Ubuntu:14.04:LTS
varnish

Package

Name
varnish
Purl
pkg:deb/ubuntu/varnish?arch=source&distro=trusty

Affected ranges

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

Affected versions

3.*
3.0.4-1ubuntu1
3.0.4-1ubuntu2
3.0.5-1ubuntu2
3.0.5-2
3.0.5-2ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi1",
            "binary_version": "3.0.5-2ubuntu0.1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "3.0.5-2ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:24.04:LTS
varnish

Package

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

Affected ranges

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

Affected versions

7.*
7.1.1-1.1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi3",
            "binary_version": "7.1.1-1.1ubuntu1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "7.1.1-1.1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:25.10
varnish

Package

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

Affected ranges

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

Affected versions

7.*
7.7.0-1
7.7.0-2
7.7.0-3
7.7.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi3",
            "binary_version": "7.7.3-1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "7.7.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:26.04:LTS
varnish

Package

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

Affected ranges

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

Affected versions

7.*
7.7.3-1
7.7.3-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi3",
            "binary_version": "7.7.3-1build1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "7.7.3-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:Pro:16.04:LTS
varnish

Package

Name
varnish
Purl
pkg:deb/ubuntu/varnish?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

4.*
4.0.3-1
4.1.0-1
4.1.0-2
4.1.1-1
4.1.1-1ubuntu0.2
4.1.1-1ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi1",
            "binary_version": "4.1.1-1ubuntu0.2+esm1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "4.1.1-1ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:Pro:18.04:LTS
varnish

Package

Name
varnish
Purl
pkg:deb/ubuntu/varnish?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

5.*
5.0.0-7.1
5.2.1-1
5.2.1-1ubuntu0.1
5.2.1-1ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi1",
            "binary_version": "5.2.1-1ubuntu0.1+esm1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "5.2.1-1ubuntu0.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:Pro:20.04:LTS
varnish

Package

Name
varnish
Purl
pkg:deb/ubuntu/varnish?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

6.*
6.1.1-1
6.2.1-2
6.2.1-2ubuntu0.1~esm1
6.2.1-2ubuntu0.1~esm2
6.2.1-2ubuntu0.1
6.2.1-2ubuntu0.2
6.2.1-2ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi2",
            "binary_version": "6.2.1-2ubuntu0.2+esm1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "6.2.1-2ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"
Ubuntu:Pro:22.04:LTS
varnish

Package

Name
varnish
Purl
pkg:deb/ubuntu/varnish?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

6.*
6.5.2-1
6.6.1-1
6.6.1-1ubuntu0.2
6.6.1-1ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libvarnishapi2",
            "binary_version": "6.6.1-1ubuntu0.2+esm1"
        },
        {
            "binary_name": "varnish",
            "binary_version": "6.6.1-1ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34475.json"