PT-2026-30236 · Openprinting · Cups

Manizada · Published 2026-04-01 · Updated 2026-04-30 · CVE-2026-34978

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Name of the Vulnerable Software and Affected Versions OpenPrinting CUPS versions 2.4.16 and earlier

Description The RSS notifier allows path traversal in the 'notify-recipient-uri' parameter (for example, 'rss:///../job.cache'). This enables a remote IPP client to write RSS XML bytes outside the CacheDir/rss directory to any location that is lp-writable. Since CacheDir is typically group-writable by default, the notifier can replace root-managed state files using a temporary file and the rename() function. This can lead to the corruption of the job cache, causing the scheduler to fail and previously queued jobs to disappear after a restart of cupsd.

Recommendations Update the rootio-cups package to a fixed version.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BDU:2026-05582

CVE-2026-34978

ECHO-6ED2-4F33-7D2A

OESA-2026-1932

OESA-2026-1933

OESA-2026-2018

OESA-2026-2019

OESA-2026-2020

OESA-2026-2021

OPENSUSE-SU-2026:10589-1

RHSA-2026:8814

Affected Products

Cups

References · 41

• 🔥 https://github.com/OpenPrinting/cups/security/advisories/GHSA-f53q-7mxp-9gcr · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-34978 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-34978 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1933 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-34978 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2026-34978 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-34978 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34980 · Security Note
• https://bdu.fstec.ru/vul/2026-05582 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10589-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34979 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-39316 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34978 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34990 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-34978 · Vendor Advisory