UBUNTU-CVE-2026-59941

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-59941
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59941.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-59941
Upstream
Published
2026-07-30T00:00:00Z
Modified
2026-07-30T16:00:37.225548527Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior accept a BMP image and generates a PDF-compatible PNG based only on its declared header dimensions and never bounds width × height before the image is converted through GD. A 58-byte BMP whose header declares e.g. 6000×6000 is accepted and later drives imagecreatetruecolor($width, $height) (and PHP's native BMP decoder) to allocate the full pixel canvas. A payload can fit in a single HTTP request: the BMP can be inlined as a data:image/bmp;base64,… URI inside attacker-controlled HTML, so no upload, no remote fetch, and no chroot-reachable file is required. I measured a 169-byte request driving a dompdf render to ~412 MB peak RSS and ~4.8 s of CPU/wall time, versus ~34 MB for an identically-sized benign request — roughly a 12× memory amplification per request, repeatable and unauthenticated. This issue has been fixed in version 3.16.

References

Affected packages

Ubuntu:Pro:16.04:LTS / php-dompdf

Package

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

Affected ranges

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

Affected versions

0.*
0.6.1+dfsg-2
0.6.1+dfsg-2build1
0.6.1+dfsg-2ubuntu1
0.6.1+dfsg-2ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-dompdf",
            "binary_version": "0.6.1+dfsg-2ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59941.json"

Ubuntu:Pro:18.04:LTS / php-dompdf

Package

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

Affected ranges

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

Affected versions

0.*
0.6.2+dfsg-3
0.6.2+dfsg-3ubuntu0.18.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-dompdf",
            "binary_version": "0.6.2+dfsg-3ubuntu0.18.04.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59941.json"

Ubuntu:20.04:LTS / php-dompdf

Package

Name
php-dompdf
Purl
pkg:deb/ubuntu/php-dompdf?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.6.2+dfsg-3
0.6.2+dfsg-3ubuntu0.20.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-dompdf",
            "binary_version": "0.6.2+dfsg-3ubuntu0.20.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59941.json"

Ubuntu:22.04:LTS / php-dompdf

Package

Name
php-dompdf
Purl
pkg:deb/ubuntu/php-dompdf?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.6.2+dfsg-3.1
0.6.2+dfsg-3.1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-dompdf",
            "binary_version": "0.6.2+dfsg-3.1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59941.json"