LowFix available
lemonldap-ng — security advisory
A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is possible to be carried out remotely. The exploit is now public and may be used. Applying a patch is the recommended action to fix this issue. The vendor confirms, that "it has been fixed some days ago and will be available in 2.23.1. CDC is quite never used, so the impact is very low."
- Products
- lemonldap-ng
- Affected versions
- 2.16.1+ds-2, 2.16.1+ds-deb12u1, 2.16.1+ds-deb12u2, 2.16.1+ds-deb12u3, 2.16.1+ds-deb12u4, 2.16.1+ds-deb12u5, 2.16.1+ds-deb12u6, 2.16.1+ds-deb12u7, 2.16.1+ds-deb12u8, 2.21.2+ds-1, 2.21.2+ds-1+deb13u1, 2.21.2+ds-1+deb13u2, 2.21.2+ds-2, 2.21.3+ds-1, 2.21.3+ds-1~bpo12+1, 2.21.3+ds-1~bpo13+1, 2.22.0+ds-1, 2.22.0+ds-2, 2.22.0+ds-2~bpo13+1, 2.22.1+ds-1, 2.22.1+ds-1~bpo13+1, 2.22.2+ds-1, 2.22.2+ds-1~bpo13+1, 2.22.3+ds-1, 2.22.3+ds-1~bpo13+1, 2.23.0+ds-1, 2.23.0+ds-2, 2.23.0+ds-3, 2.23.0+ds-3~bpo13+1, 2.23.0+ds-4
- Fixed versions
- 2.16.1+ds-deb12u9, 2.21.2+ds-1+deb13u3, 2.23.1+ds-1
- CVEs
- CVE-2026-12804
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 05:16 UTC · Revision 1
Source evidence
A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is possible to be carried out remotely. The exploit is now public and may be used. Applying a patch is the recommended action to fix this issue. The vendor confirms, that "it has been fixed some days ago and will be available in 2.23.1. CDC is quite never used, so the impact is very low."
osv:DEBIAN-CVE-2026-12804
lemonldap-ng
Fixed versions: 2.16.1+ds-deb12u9
lemonldap-ng
Fixed versions: 2.21.2+ds-1+deb13u3
lemonldap-ng
Fixed versions: 2.23.1+ds-1
Complete source record
{
"id": "dc87ee73ab1d8b5b02cc0fcbddc31b98b476938da2a2aec316eb751899a5adb2",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-12804",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-12804",
"summary": "A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is possible to be carried out remotely. The exploit is now public and may be used. Applying a patch is the recommended action to fix this issue. The vendor confirms, that \"it has been fixed some days ago and will be available in 2.23.1. CDC is quite never used, so the impact is very low.\"",
"evidence": "osv:DEBIAN-CVE-2026-12804",
"products": [
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.16.1+ds-deb12u9",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "2.16.1+ds-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u6",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u7",
"evidence": "/affected/0/versions"
},
{
"value": "2.16.1+ds-deb12u8",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.21.2+ds-1+deb13u3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "2.21.2+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.21.2+ds-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2.21.2+ds-1+deb13u2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.23.1+ds-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2.21.2+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.21.2+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.21.3+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.21.3+ds-1~bpo12+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.21.3+ds-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.0+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.0+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.0+ds-2~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.1+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.1+ds-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.2+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.2+ds-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.3+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.22.3+ds-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.23.0+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.23.0+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.23.0+ds-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.23.0+ds-3~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "2.23.0+ds-4",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2026-12804",
"aliases": [
"DEBIAN-CVE-2026-12804"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.16.1+ds-deb12u9"
}
]
}
],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/debian/lemonldap-ng?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.16.1+ds-2",
"2.16.1+ds-deb12u1",
"2.16.1+ds-deb12u2",
"2.16.1+ds-deb12u3",
"2.16.1+ds-deb12u4",
"2.16.1+ds-deb12u5",
"2.16.1+ds-deb12u6",
"2.16.1+ds-deb12u7",
"2.16.1+ds-deb12u8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12804.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.21.2+ds-1+deb13u3"
}
]
}
],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/debian/lemonldap-ng?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.21.2+ds-1",
"2.21.2+ds-1+deb13u1",
"2.21.2+ds-1+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12804.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.23.1+ds-1"
}
]
}
],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/debian/lemonldap-ng?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.21.2+ds-1",
"2.21.2+ds-2",
"2.21.3+ds-1",
"2.21.3+ds-1~bpo12+1",
"2.21.3+ds-1~bpo13+1",
"2.22.0+ds-1",
"2.22.0+ds-2",
"2.22.0+ds-2~bpo13+1",
"2.22.1+ds-1",
"2.22.1+ds-1~bpo13+1",
"2.22.2+ds-1",
"2.22.2+ds-1~bpo13+1",
"2.22.3+ds-1",
"2.22.3+ds-1~bpo13+1",
"2.23.0+ds-1",
"2.23.0+ds-2",
"2.23.0+ds-3",
"2.23.0+ds-3~bpo13+1",
"2.23.0+ds-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12804.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-18T04:00:07.221851761Z",
"provider": "osv",
"upstream": [
"CVE-2026-12804"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-12804"
]
},
"related_cves": [
{
"value": "CVE-2026-12804",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 366678,
"published_at": "2026-06-21T19:16:23.097+00:00"
}