Answer in brief
CVE-2026-87876 records a Low severity (CVSS 3.0) vulnerability in Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up). The current sources do not mark it as known exploited. The current feed maps Red Hat/cups (generic), Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/rhcos/rhcos (generic), Red Hat/rhel9/cups (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 3.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/cups (generic), Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/rhcos/rhcos (generic), Red Hat/rhel9/cups (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/cupsgeneric | * | Not reported |
| Red Hat/openshift/ose-rhel-coreos-8generic | * | Not reported |
| Red Hat/rhcos/rhcosgeneric | * | Not reported |
| Red Hat/rhel9/cupsgeneric | * | Not reported |
Published upstream
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 9, 2026
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.
Quoted source text, attributed separately from HOL analysis.