DEBIAN-CVE-2026-59942
Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior are vulnerable to a Denial of Service (DoS) attack via resource exhaustion. An attacker can crash the PHP process by providing a specially crafted HTML document containing a single image with massive dimensions (e.g., 30,000x30,000 pixels). While Dompdf implements internal checks to validate image dimensions, these can be bypassed by using a high-entropy image (such as random noise) encoded in Base64 and wrapped in specific CSS containers. The vulnerability exists because the dimension validation happens early, but the resource allocation for calculating the object's bounding box and internal buffers during the rendering phase does not strictly limit the cumulative CPU time or memory usage for a single object that has passed the initial check. An unauthenticated remote attacker can cause a complete Denial of Service on the web server by submitting a crafted HTML string. This affects any application that allows users to provide HTML content or URLs that are subsequently converted to PDF using Dompdf. This issue has been fixed in version 3.16.
DEBIAN-CVE-2026-59942
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-59942
php-dompdf
Source reference: /affected/0/package/name
- Affected versions
- 2.0.3+dfsg-1
Source reference:
/affected/0/versions2.0.3+dfsg-1+deb12u1Source reference:
/affected/0/versions2.0.3+dfsg-2Source reference:
/affected/0/versions2.0.3+dfsg-3Source reference:
/affected/0/versions2.0.3+dfsg-4Source reference:
/affected/0/versions2.0.4+dfsg-1Source reference:
/affected/0/versions2.0.4+dfsg-2Source reference:
/affected/0/versions2.0.7+dfsg-1Source reference:
/affected/0/versions3.0.0+dfsg-1Source reference:
/affected/0/versions3.0.0+dfsg-2Source reference:
/affected/0/versions3.0.1+dfsg-1Source reference:
/affected/0/versions3.0.2+dfsg-1Source reference:
/affected/0/versions3.1.0+dfsg-1Source reference:
/affected/0/versions3.1.4+dfsg-1Source reference:
/affected/0/versions3.1.4+dfsg-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "php-dompdf",
"purl": "pkg:deb/debian/php-dompdf?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.0.3+dfsg-1",
"2.0.3+dfsg-1+deb12u1",
"2.0.3+dfsg-2",
"2.0.3+dfsg-3",
"2.0.3+dfsg-4",
"2.0.4+dfsg-1",
"2.0.4+dfsg-2",
"2.0.7+dfsg-1",
"3.0.0+dfsg-1",
"3.0.0+dfsg-2",
"3.0.1+dfsg-1",
"3.0.2+dfsg-1",
"3.1.0+dfsg-1",
"3.1.4+dfsg-1",
"3.1.4+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59942.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56042 · Revision 1
- Added to Heist Feed
- Publisher date