Low
cups — security advisory
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.
- Products
- cups
- Affected versions
- 2.4.10-1, 2.4.10-2, 2.4.10-3, 2.4.10-3+deb13u1, 2.4.10-3+deb13u2, 2.4.10-4, 2.4.14-1, 2.4.15-1, 2.4.16-1, 2.4.17-1, 2.4.18-1, 2.4.2-3, 2.4.2-3+deb12u1, 2.4.2-3+deb12u2, 2.4.2-3+deb12u3, 2.4.2-3+deb12u4, 2.4.2-3+deb12u5, 2.4.2-3+deb12u6, 2.4.2-3+deb12u7, 2.4.2-3+deb12u8, 2.4.2-3+deb12u9, 2.4.2-4, 2.4.2-5, 2.4.2-6, 2.4.20-1, 2.4.7-1, 2.4.7-1.1, 2.4.7-1.2, 2.4.7-2, 2.4.7-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-87876
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:49 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-87876
cups
Fixed versions: Not specified
cups
Fixed versions: Not specified
cups
Fixed versions: Not specified
Complete source record
{
"id": "eaba599d2e90bf931bf2342efb3e956cab3242a38b23b44939b388adeab7fa5b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-87876",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-87876",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-87876",
"products": [
{
"name": {
"value": "cups",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.10-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.10-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.14-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.15-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.17-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u6",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u7",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u8",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-3+deb12u9",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-5",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-6",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.20-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.7-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.7-1.2",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.7-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.7-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cups",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.10-3",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.10-3+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.10-3+deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.10-4",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.14-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.15-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.16-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.17-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.18-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.4.20-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "cups",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.10-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.10-4",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.14-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.15-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.16-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.17-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.18-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.20-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2026-87876",
"aliases": [
"DEBIAN-CVE-2026-87876"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.4.10-1",
"2.4.10-2",
"2.4.10-3",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1",
"2.4.17-1",
"2.4.18-1",
"2.4.2-3",
"2.4.2-3+deb12u1",
"2.4.2-3+deb12u2",
"2.4.2-3+deb12u3",
"2.4.2-3+deb12u4",
"2.4.2-3+deb12u5",
"2.4.2-3+deb12u6",
"2.4.2-3+deb12u7",
"2.4.2-3+deb12u8",
"2.4.2-3+deb12u9",
"2.4.2-4",
"2.4.2-5",
"2.4.2-6",
"2.4.20-1",
"2.4.7-1",
"2.4.7-1.1",
"2.4.7-1.2",
"2.4.7-2",
"2.4.7-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87876.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.4.10-3",
"2.4.10-3+deb13u1",
"2.4.10-3+deb13u2",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1",
"2.4.17-1",
"2.4.18-1",
"2.4.20-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87876.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cups",
"purl": "pkg:deb/debian/cups?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.4.10-3",
"2.4.10-4",
"2.4.14-1",
"2.4.15-1",
"2.4.16-1",
"2.4.17-1",
"2.4.18-1",
"2.4.20-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87876.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:05:03.770479282Z",
"provider": "osv",
"upstream": [
"CVE-2026-87876"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-87876"
]
},
"related_cves": [
{
"value": "CVE-2026-87876",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424257,
"published_at": "2026-09-09T17:17:53.377+00:00"
}