What’s Vulnerable › Vulnerabilities

CVE-2026-34979: OpenPrinting CUPS: Heap overflow in `get_options()`

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-03 · updated 2026-07-24
• Weakness: CWE-122

Description

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.

Affected products

• OpenPrinting cups: through 2.4.16

References

• https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh

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