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Fencer Vulns
high 7.5

CVE-2026-34980 json

OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network

published 2026-04-03 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-18887

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

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 resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.

Patch / fix

  • cups Debian 14 2.4.17-1

debian advisories DEBIAN-CVE-2026-34980

  • cups Ubuntu 22.04 LTS 2.4.1op1-1ubuntu4.20
  • cups Ubuntu 24.04 LTS 2.4.7-1.2ubuntu7.13
  • cups Ubuntu 25.10 2.4.12-0ubuntu3.9
  • cups Ubuntu 26.04 LTS 2.4.16-1ubuntu1.2
  • cups Ubuntu Pro 16.04 LTS 2.1.3-4ubuntu0.11+esm13

ubuntu advisories UBUNTU-CVE-2026-34980

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cups RHEL 9 1:2.3.3op2-39.el9_8
  • cups RHEL 10.2 1:2.4.10-18.el10_2
  • cups RHEL 8 1:2.2.6-68.el8_10
  • cups hummingbird 1 2.4.17-1.hum1
  • cups-lpd hummingbird 1 2.4.17-1.hum1
  • cups-libs hummingbird 1 2.4.17-1.hum1
  • cups-client hummingbird 1 2.4.17-1.hum1
  • cups-ipptool hummingbird 1 2.4.17-1.hum1

red hat advisories RHSA-2026:39316RHSA-2026:39302RHSA-2026:36733RHSA-2026:8814

  • cups SLE Module for Development Tools 15 SP7, SLE Module for Desktop Applications 15 SP7, SLE Module for Basesystem 15 SP7 +4 more 2.2.7-150000.3.93.1
  • cups SLES LTSS Extended Security 12 SP5 1.7.5-20.67.1
  • cups SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.7.5-20.62.1

suse advisories SUSE-SU-2026:2732-1SUSE-SU-2026:2718-1SUSE-SU-2026:1617-1

  • cups openSUSE Tumbleweed 2.4.17-1.1

opensuse advisories openSUSE-SU-2026:10589-1

  • cups AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-lpd AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-libs AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-client AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-ipptool AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-filesystem AlmaLinux 10 1:2.4.10-18.el10_2
  • cups-printerapp AlmaLinux 10 1:2.4.10-18.el10_2
  • cups AlmaLinux 9 1:2.3.3op2-39.el9_8

almalinux advisories ALSA-2026:39302ALSA-2026:39316ALSA-2026:36733

  • cups Rocky Linux 10 1:2.4.10-18.el10_2
  • cups Rocky Linux 9 1:2.3.3op2-39.el9_8
  • cups Rocky Linux 8 1:2.2.6-68.el8_10

rocky linux advisories RLSA-2026:39302RLSA-2026:39316RLSA-2026:36733

  • cups Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 2.4.18-r0

alpine advisories ALPINE-CVE-2026-34980

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cups Azure Linux 3.0 2.4.17-1

azure linux advisories AZL-81816

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-34980 updated cvss 6.4

cups: OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network

  • Red Hat Enterprise Linux 6 cups, cups-lpd, cups-php, cups-libs Red Hat Enterprise Linux 7 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) cups 2.2.6-68.el8_10
    fixed: vendor fix RHSA-2026:36733
  • Red Hat Enterprise Linux AppStream (v. 9) cups 2.3.3op2-39.el9_8
    fixed: vendor fix RHSA-2026:39316
  • Red Hat Enterprise Linux AppStream (v. 10) cups 2.4.10-18.el10_2
    fixed: vendor fix RHSA-2026:39302
  • Red Hat Enterprise Linux BaseOS (v. 8) cups 2.2.6-68.el8_10
    fixed: vendor fix RHSA-2026:36733
  • Red Hat Enterprise Linux BaseOS (v. 9) cups 2.3.3op2-39.el9_8
    fixed: vendor fix RHSA-2026:39316
  • Red Hat Enterprise Linux BaseOS (v. 10) cups 2.4.10-18.el10_2
    fixed: vendor fix RHSA-2026:39302
  • Red Hat Hardened Images cups 2.4.17-1.hum1, cups-lpd 2.4.17-1.hum1, cups-libs 2.4.17-1.hum1, cups-client 2.4.17-1.hum1, cups-ipptool 2.4.17-1.hum1, cups-filesystem 2.4.17-1.hum1, +1 more
    fixed: vendor fix RHSA-2026:8814
show 2 more
  • Red Hat Enterprise Linux AppStream (v. 8) cups-lpd 2.2.6-68.el8_10, cups-client 2.2.6-68.el8_10, cups-ipptool 2.2.6-68.el8_10, cups-filesystem 2.2.6-68.el8_10 Red Hat Enterprise Linux AppStream (v. 9) cups-lpd 2.3.3op2-39.el9_8, cups-client 2.3.3op2-39.el9_8, cups-ipptool 2.3.3op2-39.el9_8, cups-filesystem 2.3.3op2-39.el9_8, cups-printerapp 2.3.3op2-39.el9_8 Red Hat Enterprise Linux AppStream (v. 10) cups-lpd 2.4.10-18.el10_2, cups-client 2.4.10-18.el10_2, cups-ipptool 2.4.10-18.el10_2, cups-printerapp 2.4.10-18.el10_2 Red Hat Enterprise Linux BaseOS (v. 8) cups-libs 2.2.6-68.el8_10 Red Hat Enterprise Linux BaseOS (v. 9) cups-libs 2.3.3op2-39.el9_8 Red Hat Enterprise Linux BaseOS (v. 10) cups-libs 2.4.10-18.el10_2, cups-filesystem 2.4.10-18.el10_2
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

1.65% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-4852-v58g-6cwf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.1 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.1 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • OpenPrinting cups

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.