What’s Vulnerable › Vulnerabilities

CVE-2018-18020

• Severity: low (CVSS 3.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-06 · updated 2026-06-17
• Weakness: CWE-674

Description

In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file.

Affected products

• Qpdf Project Qpdf: 8.2.1

References

• https://github.com/qpdf/qpdf/issues/243
• https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html
• https://github.com/qpdf/qpdf/issues/243
• https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html

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