CVE-2026-105326Cups: cups: argument injection in mailto notifier via notify-recipient-uri
Updated under an hour ago ()
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It affects Red Hat Hardened Images and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 2.5 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-88
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Hardened Images redhat:hummingbird | from 2.4.19-4.3.hum1 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:77638vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-105326vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2545835issue-tracking, x-refsource-redhat
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.