Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-105326
Red Hat Red Hat Hardened Images — Cups: cups: argument injection in mailto notifier via notify-recipient-uri
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U L N N 2.5 .0022 11.0 —
AFFECTED
Product Versions Fixed
Red Hat Hardened Images unspecified 2.4.19-4.3.hum1
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat Enterprise Linux 9 unspecified —
TIMELINE
Oct 5 Reserved by redhat
Oct 5 Published (CNA: redhat)
Oct 7 PATCH SHIPPED — CVE-2026-105326 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 2.4.19-4.3.hum1.
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| October 5, 2026 | Reserved | Reserved by redhat |
| October 5, 2026 | Published | Published (CNA: redhat) |
| October 7, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-105326 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 2.4.19-4.3.hum1. |
Affected
Affected products and packages — 5 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Hardened Images | — | — | 2.4.19-4.3.hum1 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-105326 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
