UBUNTU-CVE-2026-55195

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Source
https://ubuntu.com/security/CVE-2026-55195
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55195.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55195
Upstream
Published
2026-07-08T21:16:00Z
Modified
2026-07-15T17:53:44Z
Severity
  • 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

py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, py7zr's Worker.decompress() extracted archive entries without tracking total decompressed size, allowing a crafted .7z file such as a 15.6 KB archive that expands to 100 MB to exhaust disk or memory before extraction completes. This issue is fixed in version 1.1.3.

References

Affected packages

Ubuntu:22.04:LTS / py7zr

Package

Name
py7zr
Purl
pkg:deb/ubuntu/py7zr?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.11.3+dfsg-1
0.11.3+dfsg-1ubuntu1
0.11.3+dfsg-2
0.11.3+dfsg-3
0.11.3+dfsg-4
0.11.3+dfsg-4ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-py7zr",
            "binary_version": "0.11.3+dfsg-4ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55195.json"

Ubuntu:24.04:LTS / py7zr

Package

Name
py7zr
Purl
pkg:deb/ubuntu/py7zr?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.11.3+dfsg-6
0.11.3+dfsg-7
0.11.3+dfsg-8
0.11.3+dfsg-8build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-py7zr",
            "binary_version": "0.11.3+dfsg-8build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55195.json"

Ubuntu:25.10 / py7zr

Package

Name
py7zr
Purl
pkg:deb/ubuntu/py7zr?arch=source&distro=questing

Affected ranges

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

Affected versions

0.*
0.22.0+dfsg-1
1.*
1.0.0+dfsg1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-py7zr",
            "binary_version": "1.0.0+dfsg1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55195.json"

Ubuntu:26.04:LTS / py7zr

Package

Name
py7zr
Purl
pkg:deb/ubuntu/py7zr?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.0.0+dfsg1-1
1.0.0+dfsg1-3
1.0.0+dfsg1-4
1.0.0+dfsg1-5
1.1.2+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-py7zr",
            "binary_version": "1.1.2+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55195.json"