CVE-2026-105326

Impact

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.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://access.redhat.com/errata/RHSA-2026:77638
• https://access.redhat.com/security/cve/CVE-2026-105326
• https://bugzilla.redhat.com/show_bug.cgi?id=2545835
• https://github.com/OpenPrinting/cups/commit/1244ed9
• https://github.com/OpenPrinting/cups/commit/611d1bd
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3