← Vulnerability feed

Vulnerability record · CVE-2026-59941 · published 28 July 2026

CVE-2026-59941: Dompdf project dompdf uncontrolled resource consumption vulnerability

Dompdf Project · Dompdf

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.

6.3 CVSS 4.0 Medium EPSS 0.64% · top 51.2% CWE-400 · Uncontrolled resource consumption
6.3CVSS 4.0 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
4 Aug 2026Last modified by NVD

Description

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/dompdf/dompdf/commit/7c65e7bbeccf146b2409740405af73949ad129d0 Patch
https://github.com/dompdf/dompdf/releases/tag/v3.1.6 Release Notes
https://github.com/dompdf/dompdf/security/advisories/GHSA-8hg6-c449-896m ExploitVendor Advisory
https://github.com/dompdf/dompdf/security/advisories/GHSA-8hg6-c449-896m ExploitVendor Advisory

Track CVE-2026-59941 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-3902Dompdf project dompdf xml external entity (xxe) vulnerabilityAn improper restriction of external entities (XXE) vulnerability in dompdf/dompdf's SVG parser allows for Server-Side Request Forgery (SSRF) and dese…EPSS 0.95%9.8CVE-2021-3838Dompdf project dompdf deserialization of untrusted data vulnerabilityDomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the file_get_conte…EPSS 1.4%9.8CVE-2023-24813Dompdf project dompdf interpretation conflict vulnerabilityDompdf is an HTML to PDF converter written in php. Due to the difference in the attribute parser of Dompdf and php-svg-lib, an attacker can still cal…EPSS 2.5%9.8CVE-2023-23924Dompdf project dompdf incorrect authorization vulnerabilityDompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letter…EPSS 3.6%9.8CVE-2022-28368Dompdf remote code execution via CSS @font-face src:urlDompdf 1.2.1 permits remote code execution when an HTML input containing an @font-face CSS rule with a .php file in the src:url field is processed. B…EPSS 82%analysed8.8CVE-2014-5013Dompdf project dompdf vulnerabilityDOMPDF before 0.6.2 allows remote code execution, a related issue to CVE-2014-2383.EPSS 4.5%7.5CVE-2023-50262Dompdf project dompdf improper input validation vulnerabilityDompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are all…EPSS 1.5%7.5CVE-2022-41343Dompdf project dompdf vulnerabilityregisterFont in FontMetrics.php in Dompdf before 2.0.1 allows remote file inclusion because a URI validation failure does not halt font registration,…EPSS 6.0%

Source: NIST National Vulnerability Database (record CVE-2026-59941), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.