What is CVE-2017-18183?

CVE-2017-18183 is a medium-severity vulnerability in Qpdf Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2018-02-13.

How severe is CVE-2017-18183?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Qpdf Project

CVE-2017-18183

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

Published 2018-02-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.011 · change: -0.000

Affected products

Qpdf Project

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/qpdf/qpdf/commit/8249a26d69f72b9cda584c14cc3f12769985e481 (Patch, Third Party Advisory)
github.com/qpdf/qpdf/issues/143 (Third Party Advisory)
usn.ubuntu.com/3638-1/ (vendor-advisory)

Frequently asked questions

What is CVE-2017-18183?: CVE-2017-18183 is a medium-severity vulnerability in Qpdf Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2018-02-13.
How severe is CVE-2017-18183?: Medium severity. CVSS v3 base score is 5.5 out of 10.