CVE-2026-34979
OpenPrinting CUPS: Heap overflow in `get_options()`
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.
INFO
Published Date :
April 3, 2026, 10:16 p.m.
Last Modified :
April 16, 2026, 6:28 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Apply vendor-supplied patches when available.
- Update the CUPS scheduler to a fixed version.
- Monitor for patches to address the buffer overflow.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34979.
| URL | Resource |
|---|---|
| https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh | Vendor Advisory Exploit |
| https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh | Vendor Advisory Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34979 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34979
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34979 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34979 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:* versions up to (including) 2.4.16 Added Reference Type CISA-ADP: https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 07, 2026
Action Type Old Value New Value Added Reference https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh -
New CVE Received by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-122 Added Reference https://github.com/OpenPrinting/cups/security/advisories/GHSA-6qxf-7jx6-86fh