PatchTheCVECVE-2026-59942: Dompdf is an HTML to PDF converter for PHP
CVE-2026-59942 is a high-severity flaw (CVSS 7.5) affecting dompdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 noi
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 41%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2026-07-28 |
| Last modified | 2026-08-04 |
Last updated 2026-08-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-59942?
dompdf: upgrade to 3.1.6. Exact commands for each OS are on this page.
Is CVE-2026-59942 being exploited?
CVE-2026-59942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-59942 affect?
CVE-2026-59942 affects dompdf. Severity is high (CVSS 7.5). 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
How urgent is CVE-2026-59942?
Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
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