How severe is CVE-2026-34979?

CVE-2026-34979 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-34979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34979?

CVE-2026-34979 affects Openprinting Cups. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34979?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34979 have an EU (EUVD) identifier?

Yes. CVE-2026-34979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18885.

When was CVE-2026-34979 published?

CVE-2026-34979 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-34979

CVE-2026-34979 is a medium-severity vulnerability in Openprinting Cups with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18885
Weakness: CWE-122
Affected product: Openprinting Cups
Published: 2026-04-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 attribute. At time of publication, there are no publicly available patches.
How severe is CVE-2026-34979?: CVE-2026-34979 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-34979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34979?: CVE-2026-34979 affects Openprinting Cups. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34979 have an EU (EUVD) identifier?: Yes. CVE-2026-34979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18885.
When was CVE-2026-34979 published?: CVE-2026-34979 was published on 2026-04-03 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*

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