Detections
Analytics
Alpine: ipptool, multiple cups packages: security update to 2.4.18-r0
medium Tenable Cloud Security Plugin ID 440960
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In
versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-
insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user
to gain unauthorized access to restricted operations by using a user with a username that differs only in
case from an authorized user. At time of publication, there are no publicly available patches.
(CVE-2026-27447)
- OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In
versions 2.4.16 and prior, the RSS notifier allows .. path traversal in notify-recipient-uri (e.g.,
rss:///../job.cache), letting a remote IPP client write RSS XML bytes outside CacheDir/rss (anywhere that
is lp-writable). In particular, because CacheDir is group-writable by default (typically root:lp and mode
0770), the notifier (running as lp) can replace root-managed state files via temp-file + rename(). This
PoC clobbers CacheDir/job.cache with RSS XML, and after restarting cupsd the scheduler fails to parse the
job cache and previously queued jobs disappear. At time of publication, there are no publicly available
patches. (CVE-2026-34978)
- 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.
(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, 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. (CVE-2026-34980)
Solution
Update the cups library and its related packages to version 2.4.18-r0 or later.See Also
https://security.alpinelinux.org/vuln/CVE-2026-27447
https://security.alpinelinux.org/vuln/CVE-2026-34978
https://security.alpinelinux.org/vuln/CVE-2026-34979
https://security.alpinelinux.org/vuln/CVE-2026-34980
https://security.alpinelinux.org/vuln/CVE-2026-34990
Plugin Details
Severity: Medium
ID: 440960
Version: Revision 1.5
Type: Local
Published: 4/29/2026
Updated: 7/9/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: High
Score: 7.6
Percentile: 98.46
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.2
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:P/A:N
CVSS Score Source: CVE-2026-27447
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 7
Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
CVSS Score Source: CVE-2026-34980
CVSS v4
Risk Factor: Medium
Base Score: 6.1
Threat Score: 5.6
Threat Vector: CVSS:4.0/E:P
Vector: 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
CVSS Score Source: CVE-2026-34980
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 4/3/2026
Exploitable With
Core Impact
Reference Information
CVE: CVE-2026-27447, CVE-2026-34978, CVE-2026-34979, CVE-2026-34980, CVE-2026-34990, CVE-2026-39314, CVE-2026-39316