What’s Vulnerable › Vulnerabilities

CVE-2017-18183

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-13 · updated 2026-06-17
• Weakness: CWE-835

Description

An issue was discovered in QPDF before 7.0.0. There is an infinite loop in the QPDFWriter::enqueueObject() function in libqpdf/QPDFWriter.cc.

Affected products

• Qpdf Project Qpdf: before 7.0.0 — fixed in 7.0.0

How to fix

Upgrade to a fixed version: Qpdf Project Qpdf 7.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/qpdf/qpdf/commit/8249a26d69f72b9cda584c14cc3f12769985e481
• https://github.com/qpdf/qpdf/issues/143
• https://usn.ubuntu.com/3638-1/
• https://github.com/qpdf/qpdf/commit/8249a26d69f72b9cda584c14cc3f12769985e481
• https://github.com/qpdf/qpdf/issues/143
• https://usn.ubuntu.com/3638-1/

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