CVE-2018-9918

Name: CVE-2018-9918
Creator: NVD / NIST
Published: 2018-04-10T18:29:00.45+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.72%

Last modified Jun 17, 2026

CVE-2018-9918 is a vulnerability of currently unknown severity. libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.. EPSS estimates a 1.72% chance of exploitation in the next 30 days.

Description

libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.

Metrics

EPSS Probability

1.72%

74.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Qpdf Project	Qpdf	<= 8.0.2
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10

References

https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223Patch
https://github.com/qpdf/qpdf/issues/202Exploit, Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/3638-1/Third Party Advisory
https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223Patch
https://github.com/qpdf/qpdf/issues/202Exploit, Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/3638-1/Third Party Advisory

Timeline

Published: Apr 10, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-9918?

How severe is CVE-2018-9918?

Severity scoring for CVE-2018-9918 is pending analysis. The EPSS model estimates a 1.72% probability of exploitation in the next 30 days.

How do I fix CVE-2018-9918?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-9918?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST