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Advisory record · GHSA-8hg6-c449-896m

Dompdf: Uncontrolled resource consumption based on declared BMP dimensions

CVSS 6.3 MediumEPSS 0.0064 · 51st percentile

Published by the GitHub Advisory Database at 22 Jul 2026, 22:50 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-8hg6-c449-896m · CVE-2026-59941 · PKSA-gh7h-hhy4-byg7
Weakness (CWE)
CWE-400
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/dompdf on Packagist) versions before 3.1.6 are affected. A remote, unauthenticated attacker can submit a small HTML document containing a crafted BMP image, which dompdf processes based on its declared dimensions and allocates a very large pixel canvas, causing high memory use and CPU time in the rendering worker and possible denial of service. Upgrade to version 3.1.6 or later; the source gives no workaround.

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 0.0064, the 51st percentile, on 14 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.