What is CVE-2026-34979?

CVE-2026-34979 is a medium-severity vulnerability in Openprinting Cups, classified under Heap-based Buffer Overflow. CVSS score: 5.3/10. Published 2026-04-03.

How severe is CVE-2026-34979?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Openprinting Cups

CVE-2026-34979

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 att…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (7.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Openprinting Cups — versions <= 2.4.16

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

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

Frequently asked questions

What is CVE-2026-34979?: CVE-2026-34979 is a medium-severity vulnerability in Openprinting Cups, classified under Heap-based Buffer Overflow. CVSS score: 5.3/10. Published 2026-04-03.
How severe is CVE-2026-34979?: Medium severity. CVSS v3 base score is 5.3 out of 10.