3.0
Low
CVE-2026-87876 Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)
Description
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.
CVSS 3.1 detail
Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:NExploitable from the adjacent network, with an ordinary account and if a user takes an action; the impact on data or service is limited.
- Attack vector
- Adjacent network
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Hardened Images 2.4 | earliest → < 2.4.19-4.2.hum1 | 2.4.19-4.2.hum1 |
| Red Hat OpenShift Container Platform 4 | Versions not published |
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Not rated