Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)
CVE-2026-87876 is fixed in 15 products on 1 platform, first by ALAS2023-2026-3415, released November 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cups · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-client · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-client-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-debugsource · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-devel · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-filesystem · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-ipptool · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-ipptool-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-libs · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-libs-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-lpd · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-lpd-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-printerapp · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
| cups-printerapp-debuginfo · amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 | Nov 10, 2026 |
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