CVE-2017-18185: Qpdf Project Qpdf

Medium severity, CVSS 5.5. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in QPDF before 7.0.0. There is a large heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc. It is caused by an integer overflow in the PNG filter.

Affected products

• Qpdf Project Qpdf: before 7.0.0 (fixed in 7.0.0)

Published 2018-02-13. Last modified 2026-06-17.