Low 3.0Published Sep 9, 2026

CVE-2026-87876Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects Red Hat Hardened Images and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Hardened Images

Exploited in the last 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.

CVSS: 3.0 LOW (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-178
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Awaiting Analysis
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Hardened Images redhat:hummingbird	from 2.4.19-4.2.hum1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record

References

https://access.redhat.com/errata/RHSA-2026:67568vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-87876vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2530991issue-tracking, x-refsource-redhat
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.