What’s Vulnerable › Vulnerabilities

CVE-2018-9918

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-04-10 · updated 2026-06-17
• Weakness: CWE-674

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Qpdf Project Qpdf: through 8.0.2

References

• https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223
• https://github.com/qpdf/qpdf/issues/202
• https://usn.ubuntu.com/3638-1/
• https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223
• https://github.com/qpdf/qpdf/issues/202
• https://usn.ubuntu.com/3638-1/

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