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CVE-2026-34990

CVE-2026-34990 · OpenPrinting CUPS: Local print admin token disclosure using temporary printers

This page contains facts from public vulnerability sources. Check the original advisory before updating.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.

CVSS 5.0 · Medium · EPSS 0.2% · Public exploit · Fix available

Published
Updated

Stack: system

Affected products and versions

  • cups

    Versions
    • <= 2.4.16: Affected

    No fix published

  • cups Debian:12

    Versions
    • 2.4.10-1
    • 2.4.10-2
    • 2.4.10-3
    • 2.4.10-4
    • 2.4.14-1
    • 2.4.15-1
    • 2.4.16-1
    • 2.4.17-1
    • 2.4.18-1
    • 2.4.2-3
    • 2.4.2-3+deb12u1
    • 2.4.2-3+deb12u2
    • 2.4.2-3+deb12u3
    • 2.4.2-3+deb12u4
    • 2.4.2-3+deb12u5
    • 2.4.2-3+deb12u6
    • 2.4.2-3+deb12u7
    • 2.4.2-3+deb12u8
    • 2.4.2-3+deb12u9
    • 2.4.2-4
    • 2.4.2-5
    • 2.4.2-6
    • 2.4.7-1
    • 2.4.7-1.1
    • 2.4.7-1.2
    • 2.4.7-2
    • 2.4.7-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cups Debian:13

    Versions
    • 2.4.10-3
    • 2.4.10-3+deb13u1
    • 2.4.10-3+deb13u2
    • 2.4.10-4
    • 2.4.14-1
    • 2.4.15-1
    • 2.4.16-1
    • 2.4.17-1
    • 2.4.18-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cups Debian:14

    Versions
    • 2.4.10-3
    • 2.4.10-4
    • 2.4.14-1
    • 2.4.15-1
    • 2.4.16-1
    Affected ranges
    • ECOSYSTEM: < 2.4.17-1

    Update to 2.4.17-1

  • cups Ubuntu:Pro:16.04:LTS

    Versions
    • 2.1.0-4ubuntu3
    • 2.1.0-5
    • 2.1.0-6
    • 2.1.0-6ubuntu1
    • 2.1.0-7
    • 2.1.2-1
    • 2.1.2-2
    • 2.1.3-1
    • 2.1.3-1build1
    • 2.1.3-3
    • 2.1.3-4
    • 2.1.3-4ubuntu0.2
    • 2.1.3-4ubuntu0.3
    • 2.1.3-4ubuntu0.4
    • 2.1.3-4ubuntu0.5
    • 2.1.3-4ubuntu0.6
    • 2.1.3-4ubuntu0.7
    • 2.1.3-4ubuntu0.8
    • 2.1.3-4ubuntu0.9
    • 2.1.3-4ubuntu0.10
    • 2.1.3-4ubuntu0.11
    • 2.1.3-4ubuntu0.11+esm1
    • 2.1.3-4ubuntu0.11+esm2
    • 2.1.3-4ubuntu0.11+esm3
    • 2.1.3-4ubuntu0.11+esm4
    • 2.1.3-4ubuntu0.11+esm5
    • 2.1.3-4ubuntu0.11+esm6
    • 2.1.3-4ubuntu0.11+esm7
    • 2.1.3-4ubuntu0.11+esm8
    • 2.1.3-4ubuntu0.11+esm9
    • 2.1.3-4ubuntu0.11+esm11
    • 2.1.3-4ubuntu0.11+esm12
    • 2.1.3-4ubuntu0.11+esm13
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cups Ubuntu:Pro:18.04:LTS

    Versions
    • 2.2.4-7ubuntu2
    • 2.2.5-2
    • 2.2.6-2
    • 2.2.6-3
    • 2.2.6-4
    • 2.2.6-5
    • 2.2.7-1ubuntu1
    • 2.2.7-1ubuntu2
    • 2.2.7-1ubuntu2.1
    • 2.2.7-1ubuntu2.2
    • 2.2.7-1ubuntu2.3
    • 2.2.7-1ubuntu2.4
    • 2.2.7-1ubuntu2.5
    • 2.2.7-1ubuntu2.6
    • 2.2.7-1ubuntu2.7
    • 2.2.7-1ubuntu2.8
    • 2.2.7-1ubuntu2.9
    • 2.2.7-1ubuntu2.10
    • 2.2.7-1ubuntu2.10+esm1
    • 2.2.7-1ubuntu2.10+esm2
    • 2.2.7-1ubuntu2.10+esm3
    • 2.2.7-1ubuntu2.10+esm4
    • 2.2.7-1ubuntu2.10+esm5
    • 2.2.7-1ubuntu2.10+esm6
    • 2.2.7-1ubuntu2.10+esm7
    • 2.2.7-1ubuntu2.10+esm9
    • 2.2.7-1ubuntu2.10+esm10
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cups Ubuntu:Pro:20.04:LTS

    Versions
    • 2.2.12-2ubuntu1
    • 2.3.0-6
    • 2.3.0-7
    • 2.3.0-7ubuntu1
    • 2.3.1-1ubuntu1
    • 2.3.1-2
    • 2.3.1-4
    • 2.3.1-7
    • 2.3.1-9ubuntu1
    • 2.3.1-9ubuntu1.1
    • 2.3.1-9ubuntu1.2
    • 2.3.1-9ubuntu1.3
    • 2.3.1-9ubuntu1.4
    • 2.3.1-9ubuntu1.5
    • 2.3.1-9ubuntu1.6
    • 2.3.1-9ubuntu1.7
    • 2.3.1-9ubuntu1.8
    • 2.3.1-9ubuntu1.9
    • 2.3.1-9ubuntu1.9+esm1
    • 2.3.1-9ubuntu1.9+esm3
    • 2.3.1-9ubuntu1.9+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • cups Ubuntu:22.04:LTS

    Versions
    • 2.3.3op2-7ubuntu2
    • 2.4.1op1-1ubuntu1
    • 2.4.1op1-1ubuntu2
    • 2.4.1op1-1ubuntu3
    • 2.4.1op1-1ubuntu4
    • 2.4.1op1-1ubuntu4.1
    • 2.4.1op1-1ubuntu4.2
    • 2.4.1op1-1ubuntu4.4
    • 2.4.1op1-1ubuntu4.6
    • 2.4.1op1-1ubuntu4.7
    • 2.4.1op1-1ubuntu4.8
    • 2.4.1op1-1ubuntu4.9
    • 2.4.1op1-1ubuntu4.10
    • 2.4.1op1-1ubuntu4.11
    • 2.4.1op1-1ubuntu4.12
    • 2.4.1op1-1ubuntu4.15
    • 2.4.1op1-1ubuntu4.16
    Affected ranges
    • ECOSYSTEM: < 2.4.1op1-1ubuntu4.20

    Update to 2.4.1op1-1ubuntu4.20

  • cups Ubuntu:24.04:LTS

    Versions
    • 2.4.6-0ubuntu3
    • 2.4.7-1.2ubuntu2
    • 2.4.7-1.2ubuntu3
    • 2.4.7-1.2ubuntu7
    • 2.4.7-1.2ubuntu7.1
    • 2.4.7-1.2ubuntu7.2
    • 2.4.7-1.2ubuntu7.3
    • 2.4.7-1.2ubuntu7.4
    • 2.4.7-1.2ubuntu7.7
    • 2.4.7-1.2ubuntu7.9
    Affected ranges
    • ECOSYSTEM: < 2.4.7-1.2ubuntu7.13

    Update to 2.4.7-1.2ubuntu7.13

  • cups Ubuntu:25.10

    Versions
    • 2.4.12-0ubuntu1
    • 2.4.12-0ubuntu2
    • 2.4.12-0ubuntu3
    • 2.4.12-0ubuntu3.3
    • 2.4.12-0ubuntu3.5
    Affected ranges
    • ECOSYSTEM: < 2.4.12-0ubuntu3.9

    Update to 2.4.12-0ubuntu3.9

  • cups Ubuntu:26.04:LTS

    Versions
    • 2.4.12-0ubuntu3
    • 2.4.12-0ubuntu5
    • 2.4.16-1ubuntu1
    Affected ranges
    • ECOSYSTEM: < 2.4.16-1ubuntu1.2

    Update to 2.4.16-1ubuntu1.2

Original sources

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