CVE-2018-9918

libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name...

7.8 HighFix available

CVE-2018-9918 is a high vulnerability (CVSS 7.8) in Qpdf Project Qpdf, published April 10, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.67%, the 76th percentile. Fixed in qpdf 8.0.2-3.

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.67%Up 0.4 points since Apr 14, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2018-9918
CVSS 3.0: 7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-674
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-9918
Updated: 2026-11-02

EUVDEUVD-2018-21510 No score

Record: EUVD-2018-21510
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mcgj-mgj8-8cr3 7.8

libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name...

Record: GHSA-mcgj-mgj8-8cr3
CVSS 3.0: 7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-674
Updated: 2026-11-02

OSV 7.8

Record: CVE-2018-9918
CVSS 3.0: 7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-9918 7.8

Record: DEBIAN-CVE-2018-9918
CVSS 3.0: 7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

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OSVUBUNTU-CVE-2018-9918 7.8

Record: UBUNTU-CVE-2018-9918
CVSS 3.0: 7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVMGASA-2018-0232 No score

Updated qpdf packages fix security vulnerability

A flaw was found in QPDF through 8.0.2. libqpdf.a 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 (CVE-2018-9918).

Record: MGASA-2018-0232
Updated: 2026-11-02

OSVSUSE-SU-2024:2173-1 No score

Security update for qpdf

This update for qpdf fixes the following issues:

CVE-2018-9918: Fixed mishandled 'expected dictionary key but found non-name object' cases that could have allowed attackers to cause a denial of service. (bsc#1089090)

Record: SUSE-SU-2024:2173-1
Updated: 2026-11-02

OSVUSN-3638-1 No score

qpdf vulnerabilities

It was discovered that QPDF incorrectly handled certain malformed files. A remote attacker could use this issue to cause QPDF to crash, resulting in a denial of service, or possibly execute arbitrary code.

Record: USN-3638-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`qpdf` Debian:12	before 8.0.2-3	8.0.2-3
`qpdf` Debian:13	before 8.0.2-3	8.0.2-3
`qpdf` Debian:14	before 8.0.2-3	8.0.2-3
`qpdf` Mageia:5	before 7.1.1-1.1.mga5	7.1.1-1.1.mga5
`qpdf` Mageia:6	before 7.1.1-1.1.mga6	7.1.1-1.1.mga6
`qpdf` SUSE:Linux Enterprise Software Development Kit 12 SP5	before 7.1.1-3.11.1	7.1.1-3.11.1
`qpdf` SUSE:Linux Enterprise Server 12 SP5	before 7.1.1-3.11.1	7.1.1-3.11.1
`qpdf` SUSE:Linux Enterprise Server for SAP Applications 12 SP5	before 7.1.1-3.11.1	7.1.1-3.11.1
`qpdf` Ubuntu:14.04:LTS	before 8.0.2-3~14.04.1, plus listed versions 4.2.0-25.0.1-15.0.1-1ubuntu15.1.0-15.1.1-1	8.0.2-3~14.04.1
`qpdf` Ubuntu:16.04:LTS	before 8.0.2-3~16.04.1, plus listed versions 5.1.3-25.1.3-35.2.0-15.2.0-26.0.0-2	8.0.2-3~16.04.1

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

References

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