UBUNTU-CVE-2026-50052

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-50052
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-50052
Upstream
  • CVE-2026-50052
Published
2026-06-03T06:16:00Z
Modified
2026-06-12T09:04:22.112243950Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/AU:N/R:A/V:D/RE:L/U:Green CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack (request smuggling), which in turn can be used for cache poisoning, authentication bypass, or possibly even information disclosure and manipulation. The attack vector only exists if HTTP/2 support is enabled by setting the feature parameter to contain +http2. HTTP/2 support is disabled by default.

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "7.1.1-1.1ubuntu1",
            "binary_name": "libvarnishapi3"
        },
        {
            "binary_version": "7.1.1-1.1ubuntu1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "7.7.3-1",
            "binary_name": "libvarnishapi3"
        },
        {
            "binary_version": "7.7.3-1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "7.7.3-1build1",
            "binary_name": "libvarnishapi3"
        },
        {
            "binary_version": "7.7.3-1build1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "4.1.1-1ubuntu0.2+esm1",
            "binary_name": "libvarnishapi1"
        },
        {
            "binary_version": "4.1.1-1ubuntu0.2+esm1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "5.2.1-1ubuntu0.1+esm1",
            "binary_name": "libvarnishapi1"
        },
        {
            "binary_version": "5.2.1-1ubuntu0.1+esm1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "6.2.1-2ubuntu0.2+esm1",
            "binary_name": "libvarnishapi2"
        },
        {
            "binary_version": "6.2.1-2ubuntu0.2+esm1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.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_version": "6.6.1-1ubuntu0.2+esm1",
            "binary_name": "libvarnishapi2"
        },
        {
            "binary_version": "6.6.1-1ubuntu0.2+esm1",
            "binary_name": "varnish"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50052.json"