{"affected":[{"defaultStatus":"affected","ecosystem":"https://catalog.redhat.com/software/containers/","packageName":"cups-main","product":"Red Hat Hardened Images","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2.4.19-4.2.hum1","versionType":"rpm"}]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"cups","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"cups","product":"Red Hat Enterprise Linux 6","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"cups","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"cups","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"cups","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhel9/cups","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift/ose-rhel-coreos-8","product":"Red Hat OpenShift Container Platform 4","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-87876","cwes":["CWE-178"],"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.","epss":{"date":"2026-11-06","percentile":0.25999,"score":0.00328},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2"}],"kev":null,"metrics":[{"score":3,"severity":"low","source":"CNA: redhat","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1793994470318,"publishedAt":1788970327970,"references":[{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:67568"},{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-87876"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2530991"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/OpenPrinting/cups/commit/88e67c00c130a45f3a1edf36686f7a0b2982fef8"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/OpenPrinting/cups/commit/f56844dbe4a54a9f8e1aeb3b913fbee614156bdb"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r8jp-q6fh-g5r2"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Fixed on upstream master branch with commit f56844d and for versions 2.4.x with commit 88e67c0."}],"revision":"25e911c7a2c1a43eb2acc4a66693b30aa5790e591de81cab60c534491c430077","sources":[{"modifiedAt":1793994470318,"name":"CNA: redhat","retrievedAt":1793995898681,"url":"https://www.cve.org/CVERecord?id=CVE-2026-87876"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793995928238,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-87876"}],"ssvc":{"assessedAt":1788977383830,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)","updatedAt":1793995928238}