CVE-2026-87876
Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)
- State
- Published
- Severity
- 3.0 Low
- Published
- Sep 9, 2026
- Updated
- Oct 21, 2026
- Reserved
- Sep 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.0 Low | CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N | redhat |
Weaknesses
- CWE-178 Improper Handling of Case Sensitivity
Affected Products
| Product | Versions |
|---|---|
Red Hat Hardened ImagesRed Hat |
|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:67568vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-87876vdb-entry
- RHBZ#2530991issue-tracking
- https://github.com/OpenPrinting/cups/commit/88e67c00c130a45f3a1edf36686f7a0b2982fef8
- https://github.com/OpenPrinting/cups/commit/f56844dbe4a54a9f8e1aeb3b913fbee614156bdb
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2
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