---
cve: "CVE-2026-59941"
severity: "MEDIUM"
cvss: 6.3
epss: "64%"
vendor: "dompdf"
kev: false
exploited: false
published: "2026-07-28 21:17:29"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T03:05:48+02:00"
---

# CVE-2026-59941

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 6d4b4eb8500f7a786da8868ba463a71b725a4005 (Commit)
- 7c65e7bbeccf146b2409740405af73949ad129d0 (Commit)

## Referenzen

- <https://github.com/dompdf/dompdf/security/advisories/GHSA-8hg6-c449-896m>
- <https://github.com/dompdf/dompdf/commit/7c65e7bbeccf146b2409740405af73949ad129d0>
- <https://github.com/dompdf/dompdf/releases/tag/v3.1.6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59941) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_