CVE-2026-87876: Red Hat Enterprise Linux 10

Low severity, CVSS 3.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.

Affected products

• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9
• Red Hat Red Hat Hardened Images: before 2.4.19-4.2.hum1 (fixed in 2.4.19-4.2.hum1)
• Red Hat Red Hat Openshift Container Platform 4

Published 2026-09-09. Last modified 2026-09-21.