UBUNTU-CVE-2026-3945

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Source
https://ubuntu.com/security/CVE-2026-3945
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3945.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-3945
Upstream
Published
2026-03-30T08:16:00Z
Modified
2026-08-13T03:00:18Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol without properly validating overflow conditions (e.g., errno == ERANGE).

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
0 Unknown 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-2026-3945.json"
Ubuntu:24.04:LTS
tinyproxy

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-3945.json"
Ubuntu:25.10
tinyproxy

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-3945.json"
Ubuntu:26.04:LTS
tinyproxy

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-3945.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
0 Unknown 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-2026-3945.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
0 Unknown 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-2026-3945.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
0 Unknown 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-2026-3945.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
0 Unknown 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-2026-3945.json"