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MEDIUM severity

DOMPDF denial of service vulnerabilityGHSA-q83c-64c9-c42m

MEDIUM

GHSA-q83c-64c9-c42m is a medium-severity (CVSS 6.5) vulnerability in dompdf/dompdf. A fix is available for dompdf/dompdf — see the affected versions and patch details below.

Also known asCVE-2014-5012
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs69th percentile — riskier than 69% of all scored CVEsHighest risk
0.00%0.61%1.22%1.84%0.1%1.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘dompdf/dompdf

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

DOMPDF before 0.6.2 allows denial of service.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistdompdf/dompdf≥ 0.6&&< 0.6.20.6.2composer require dompdf/dompdf:^0.6.2

Affected Products

1 product · 1 configurations
Application
dompdfdompdf_project
< 0.6.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dompdf/dompdf, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update dompdf/dompdf to 0.6.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q83c-64c9-c42m is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

DOMPDF before 0.6.2 allows denial of service.
O3 Security · Impact-Aware SCA

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DOMPDF denial of service vulnerability (Medium 6.5)