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Advisory record · GHSA-f5gf-2cj8-52g2

Dompdf: Denial of Service (DoS) via Resource Exhaustion using Oversized Image Bitmaps

CVSS 6.3 MediumEPSS 0.0090 · 60th percentile

Published by the GitHub Advisory Database at 22 Jul 2026, 22:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
dompdf/dompdfPackagist<3.1.63.1.6
Identifiers
GHSA-f5gf-2cj8-52g2 · CVE-2026-59942 · PKSA-6r8f-nxsb-67bq
Weakness (CWE)
CWE-400 · CWE-770
Tags
Published
22 Jul 2026
Updated
22 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Dompdf/dompdf versions before 3.1.6 are vulnerable to denial of service through resource exhaustion when rendering oversized images. An unauthenticated attacker who can submit HTML for PDF conversion can supply an image with very large dimensions, causing the PHP process to crash. Upgrade to Dompdf 3.1.6 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0090, the 60th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.