UBUNTU-CVE-2026-55202

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Source
https://ubuntu.com/security/CVE-2026-55202
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55202
Upstream
Published
2026-06-17T20:17:00Z
Modified
2026-06-24T11:02:00.620310537Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
  • 8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.

References

Affected packages

Ubuntu:20.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.10.0-2
1.10.0-4
1.10.0-4ubuntu0.1
1.10.0-4ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.10.0-4ubuntu0.2"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.10.0-4ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:24.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.11.1-2.1
1.11.1-3
1.11.1-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.11.1-3ubuntu0.1"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.11.1-3ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:25.10
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.11.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.11.2-1"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.11.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:26.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.11.2-1
1.11.2-1build1
1.11.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.11.3-1"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.11.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:Pro:14.04:LTS
tinyproxy

Package

Name
tinyproxy
Purl
pkg:deb/ubuntu/tinyproxy?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.8.3-3ubuntu1
1.8.3-3ubuntu14.04.1~esm1
1.8.3-3ubuntu14.04.1~esm2
1.8.3-3ubuntu14.04.1~esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.8.3-3ubuntu14.04.1~esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:Pro:16.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.8.3-3ubuntu1
1.8.3-3ubuntu16.04.1~esm1
1.8.3-3ubuntu16.04.1~esm2
1.8.3-3ubuntu16.04.1~esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.8.3-3ubuntu16.04.1~esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:Pro:18.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.8.4-2
1.8.4-3
1.8.4-5
1.8.4-5ubuntu0.1~esm1
1.8.4-5ubuntu0.1~esm2
1.8.4-5ubuntu0.1~esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.8.4-5ubuntu0.1~esm3"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.8.4-5ubuntu0.1~esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"
Ubuntu:Pro:22.04:LTS
tinyproxy

Package

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

Affected ranges

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

Affected versions

1.*
1.10.0-5
1.11.0-1
1.11.0-1ubuntu0.1~esm1
1.11.0-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "tinyproxy",
            "binary_version": "1.11.0-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "tinyproxy-bin",
            "binary_version": "1.11.0-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55202.json"