UBUNTU-CVE-2026-28804

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Source
https://ubuntu.com/security/CVE-2026-28804
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28804.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-28804
Upstream
Published
2026-03-06T07:16:00Z
Modified
2026-05-20T16:24:53.873512630Z
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
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

References

Affected packages

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_name": "python3-pypdf",
            "binary_version": "4.0.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28804.json"

Ubuntu:25.10 / pypdf

Package

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

Affected ranges

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

Affected versions

4.*
4.3.1-1
5.*
5.4.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pypdf",
            "binary_version": "5.4.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28804.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_name": "python3-pypdf",
            "binary_version": "6.9.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28804.json"