CVE-2026-34980: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems

Q: How do I fix CVE-2026-34980?

cups: upgrade to newer than 2.4.16. Exact commands for each OS are on this page.

Q: Is CVE-2026-34980 being exploited?

CVE-2026-34980 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34980 affect?

CVE-2026-34980 affects cups. Severity is high (CVSS 7.5). OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that sh

Q: How urgent is CVE-2026-34980?

Priority 55/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.5WATCHLISTUPGRADE

CVE-2026-34980 is a high-severity flaw (CVSS 7.5) affecting cups. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the res

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: openprinting

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 22:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

openprinting cups UPGRADE

Affected: <= 2.4.16

Fixed in: newer than 2.4.16

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cups || rpm -q cups || cups --version

2. UPGRADE to newer than 2.4.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cups

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cups

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · python-googleapis-common-protos · FIXED · 1.75.5-1.fc46~bootstrap · FEDORA-2026-d911c4c4e6 · source

sudo dnf upgrade --advisory=FEDORA-2026-d911c4c4e6

Fedora ELN · see advisory · FIXED · FEDORA-2026-e3987c278f · source

sudo dnf upgrade --advisory=FEDORA-2026-e3987c278f

Debian 12 · cups · NO FIX YET

Debian 13 · cups · NO FIX YET

RHEL 10 · cups · FIXED · cups-2.4.10-18.el10_2

sudo dnf upgrade --advisory=RHSA-2026:39302 rpm -q cups

RHEL 8 · cups · FIXED · cups-2.2.6-68.el8_10

sudo dnf upgrade --advisory=RHSA-2026:36733 rpm -q cups

RHEL 9 · cups · FIXED · cups-2.3.3op2-39.el9_8

sudo dnf upgrade --advisory=RHSA-2026:39316 rpm -q cups

RHEL 6 · cups · DEFERRED

RHEL 7 · cups · DEFERRED

Alpine 3.20 · cups · FIXED · cups-2.4.18-r0

apk add --upgrade cups apk info -v cups

Alpine 3.21 · cups · FIXED · cups-2.4.18-r0

apk add --upgrade cups apk info -v cups

Alpine 3.22 · cups · FIXED · cups-2.4.18-r0

apk add --upgrade cups apk info -v cups

Alpine 3.23 · cups · FIXED · cups-2.4.18-r0

apk add --upgrade cups apk info -v cups

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1635 · source

sudo dnf update --advisory=ALAS2023-2026-1635

Amazon Linux 2 · see advisory · FIXED · ALAS2-2026-3279 · source

sudo yum update --advisory=ALAS2-2026-3279

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: HORKimhab/CVE-2026-34980 (0 stars)
Write-up: github.com/OpenPrinting/cups/security/advisories/GHSA-4852-v58g-6cwf

Advisories and coverage

Official advisories

AlmaLinux Errata: [ALSA-2026:39316] Moderate: cups security update 2026-07-15

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34980?

cups: upgrade to newer than 2.4.16. Exact commands for each OS are on this page.

Is CVE-2026-34980 being exploited?

CVE-2026-34980 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34980 affect?

CVE-2026-34980 affects cups. Severity is high (CVSS 7.5). OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that sh

How urgent is CVE-2026-34980?

Priority 55/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2026-39316 MEDIUM 4.0 UPGRADE OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems
CVE-2026-41079 MEDIUM 4.3 UPGRADE OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems
CVE-2026-39314 MEDIUM 4.0 UPGRADE OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems
CVE-2026-107885 LOW 3.3 UPGRADE OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout handli
CVE-2026-107886 LOW 2.3 UPGRADE OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management

References

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