Skip to content
Fencer Intel
low 2.5

CVE-2026-105326 json

Cups: cups: argument injection in mailto notifier via notify-recipient-uri

published last mo. modified 3d ago also EUVD-2026-92637

cvss
2.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with "-" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user.

Patch / fix

  • Red Hat Red Hat Hardened Images 2.4.19-4.3.hum1
  • cups hummingbird 1 2.4.19-4.3.hum1
  • cups-lpd hummingbird 1 2.4.19-4.3.hum1
  • cups-libs hummingbird 1 2.4.19-4.3.hum1
  • cups-client hummingbird 1 2.4.19-4.3.hum1
  • cups-ipptool hummingbird 1 2.4.19-4.3.hum1
  • cups-filesystem hummingbird 1 2.4.19-4.3.hum1
  • cups-printerapp hummingbird 1 2.4.19-4.3.hum1

red hat advisories RHSA-2026:77638

  • cups SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +13 more 2.2.7-150000.3.101.2

suse advisories SUSE-SU-2026:5078-1

  • cups openSUSE Tumbleweed 2.4.20-1.1

opensuse advisories openSUSE-SU-2026:12192-1

Is CVE-2026-105326 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-105326 updated cvss 2.5

cups: cups: argument injection in mailto notifier via notify-recipient-uri

  • Red Hat Enterprise Linux 8 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem, +1 more Red Hat Enterprise Linux 9 cups, cups-lpd, cups-libs, rhel9/cups, cups-client, cups-ipptool, +3 more Red Hat Enterprise Linux 10 cups 2.4.10-18.el10_2
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images cups 2.4.19-4.3.hum1, cups-lpd 2.4.19-4.3.hum1, cups-libs 2.4.19-4.3.hum1, cups-client 2.4.19-4.3.hum1, cups-ipptool 2.4.19-4.3.hum1, cups-filesystem 2.4.19-4.3.hum1, +1 more
    fixed: vendor fix RHSA-2026:77638

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
none
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command

References

Sources

Fencer Intel 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.