CVE-2026-34979

low-risk
Published 2026-04-03

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.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Cups

Affected Vendors

Openprinting

References (2)

Vendor Advisory https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh
Vendor Advisory https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal