Medium severity · published Apr 3, 2026
CVE-2026-34979
OpenPrinting CUPS: Heap overflow in `get_options()`
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
cups · OpenPrinting
<= 2.4.16 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34979
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34979
Exploit
https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh
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