UBUNTU-CVE-2026-82398

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Source
https://ubuntu.com/security/CVE-2026-82398
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-82398
Upstream
Published
2026-08-31T22:17:00Z
Modified
2026-09-02T16:28:28Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/utils.py function readuntil_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0.

References

Affected packages

Ubuntu:20.04:LTS
pypdf2

Package

Name
pypdf2
Purl
pkg:deb/ubuntu/pypdf2?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.26.0-2
1.26.0-3ubuntu1
1.26.0-3ubuntu1.20.04.1
1.26.0-3ubuntu1.20.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.26.0-3ubuntu1.20.04.2",
            "binary_name": "python-pypdf2"
        },
        {
            "binary_version": "1.26.0-3ubuntu1.20.04.2",
            "binary_name": "python3-pypdf2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
Ubuntu:22.04:LTS
pypdf2

Package

Name
pypdf2
Purl
pkg:deb/ubuntu/pypdf2?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.26.0-4
1.26.0-4ubuntu0.22.04.1
1.26.0-4ubuntu0.22.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.26.0-4ubuntu0.22.04.2",
            "binary_name": "python3-pypdf2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
Ubuntu:24.04:LTS
pypdf

Package

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

Affected ranges

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

Affected versions

3.*
3.4.1-1
3.17.4-1
4.*
4.0.0-1
4.0.1-1
4.0.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.0.2-1",
            "binary_name": "python3-pypdf"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
pypdf2

Package

Name
pypdf2
Purl
pkg:deb/ubuntu/pypdf2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.12.1-3
2.12.1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.12.1-4",
            "binary_name": "python3-pypdf2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
Ubuntu:26.04:LTS
pypdf

Package

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

Affected ranges

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

Affected versions

5.*
5.4.0-1
6.*
6.9.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "6.9.2-1",
            "binary_name": "python3-pypdf"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
Ubuntu:Pro:16.04:LTS
pypdf2

Package

Name
pypdf2
Purl
pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
1.23+git20141008-1
1.25.1-1
1.25.1-1ubuntu0.1~esm1
1.25.1-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.25.1-1ubuntu0.1~esm2",
            "binary_name": "python-pypdf2"
        },
        {
            "binary_version": "1.25.1-1ubuntu0.1~esm2",
            "binary_name": "python3-pypdf2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"
Ubuntu:Pro:18.04:LTS
pypdf2

Package

Name
pypdf2
Purl
pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1.*
1.26.0-2
1.26.0-2ubuntu0.1~esm1
1.26.0-2ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.26.0-2ubuntu0.1~esm2",
            "binary_name": "python-pypdf2"
        },
        {
            "binary_version": "1.26.0-2ubuntu0.1~esm2",
            "binary_name": "python3-pypdf2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82398.json"