Medium
lemonldap-ng — security advisory
Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path to bypass the locationRules that restrict it. The handler matches each vhost's locationRules regular expressions against REQUEST_URI, the raw request line, while the web server routes on the path it has already percent-decoded and normalized. A request that percent-encodes a character of the path, inserts dot segments, or doubles a slash therefore reaches the protected resource under a URI that no rule regexp matches, and the vhost's default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike. Only a vhost whose default rule is more permissive than its other rules is affected. An authenticated user then reaches any URL a locationRules regexp was meant to restrict, but gains no more than that default rule already grants.
- Products
- lemonldap-ng
- Affected versions
- 1.3.3-1, 1.4.6-1, 1.4.6-2, 1.4.6-3, 1.9.10-1, 1.9.13-2, 1.9.14-1, 1.9.15-1, 1.9.16-2, 2.0.11+ds-4, 2.0.13+ds-3, 2.0.13+ds-3ubuntu1, 2.0.5+ds-2, 2.0.6+ds-2, 2.0.7+ds-2, 2.16.2+ds-1, 2.17.1+ds-1, 2.17.2+ds-1, 2.17.2+ds-2, 2.18.1+ds-1, 2.18.2+ds-1, 2.21.0+ds-3, 2.22.0+ds-2, 2.22.1+ds-1, 2.22.2+ds-1, 2.22.3+ds-1, 2.23.0+ds-3, 2.23.0+ds-4, 2.23.2+ds-1, 2.23.2+ds-2, 2.23.3+ds-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-95811
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:34 UTC · Revision 1
Source evidence
Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path to bypass the locationRules that restrict it. The handler matches each vhost's locationRules regular expressions against REQUEST_URI, the raw request line, while the web server routes on the path it has already percent-decoded and normalized. A request that percent-encodes a character of the path, inserts dot segments, or doubles a slash therefore reaches the protected resource under a URI that no rule regexp matches, and the vhost's default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike. Only a vhost whose default rule is more permissive than its other rules is affected. An authenticated user then reaches any URL a locationRules regexp was meant to restrict, but gains no more than that default rule already grants.
osv:UBUNTU-CVE-2026-95811
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
lemonldap-ng
Fixed versions: Not specified
Complete source record
{
"id": "fabb45ffe9d77536a854c930e502490c33237ef3240114c37c7e4761f436bd24",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-95811",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-95811",
"summary": "Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path to bypass the locationRules that restrict it. The handler matches each vhost's locationRules regular expressions against REQUEST_URI, the raw request line, while the web server routes on the path it has already percent-decoded and normalized. A request that percent-encodes a character of the path, inserts dot segments, or doubles a slash therefore reaches the protected resource under a URI that no rule regexp matches, and the vhost's default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike. Only a vhost whose default rule is more permissive than its other rules is affected. An authenticated user then reaches any URL a locationRules regexp was meant to restrict, but gains no more than that default rule already grants.",
"evidence": "osv:UBUNTU-CVE-2026-95811",
"products": [
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.6-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.6-3",
"evidence": "/affected/0/versions"
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},
{
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
},
{
"value": "1.9.14-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.9.15-1",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
]
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{
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},
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"affected_versions": [
{
"value": "2.0.5+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.6+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.7+ds-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.11+ds-4",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.13+ds-3",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.13+ds-3ubuntu1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2.16.2+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.17.1+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.17.2+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.17.2+ds-2",
"evidence": "/affected/4/versions"
},
{
"value": "2.18.1+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.18.2+ds-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.22.2+ds-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.22.3+ds-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.23.0+ds-3",
"evidence": "/affected/5/versions"
},
{
"value": "2.23.0+ds-4",
"evidence": "/affected/5/versions"
},
{
"value": "2.23.2+ds-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.23.2+ds-2",
"evidence": "/affected/5/versions"
},
{
"value": "2.23.3+ds-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "lemonldap-ng",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.21.0+ds-3",
"evidence": "/affected/6/versions"
},
{
"value": "2.22.0+ds-2",
"evidence": "/affected/6/versions"
},
{
"value": "2.22.1+ds-1",
"evidence": "/affected/6/versions"
},
{
"value": "2.22.2+ds-1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-95811",
"aliases": [
"UBUNTU-CVE-2026-95811"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.3.3-1",
"1.4.6-1",
"1.4.6-2",
"1.4.6-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "lemonldap-ng",
"binary_version": "1.4.6-3"
},
{
"binary_name": "liblemonldap-ng-common-perl",
"binary_version": "1.4.6-3"
},
{
"binary_name": "liblemonldap-ng-conf-perl",
"binary_version": "1.4.6-3"
},
{
"binary_name": "liblemonldap-ng-handler-perl",
"binary_version": "1.4.6-3"
},
{
"binary_name": "liblemonldap-ng-manager-perl",
"binary_version": "1.4.6-3"
},
{
"binary_name": "liblemonldap-ng-portal-perl",
"binary_version": "1.4.6-3"
}
]
}
},
{
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],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.9.10-1",
"1.9.13-2",
"1.9.14-1",
"1.9.15-1",
"1.9.16-2"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "1.9.16-2"
},
{
"binary_name": "lemonldap-ng-fastcgi-server",
"binary_version": "1.9.16-2"
},
{
"binary_name": "lemonldap-ng-handler",
"binary_version": "1.9.16-2"
},
{
"binary_name": "liblemonldap-ng-common-perl",
"binary_version": "1.9.16-2"
},
{
"binary_name": "liblemonldap-ng-handler-perl",
"binary_version": "1.9.16-2"
},
{
"binary_name": "liblemonldap-ng-manager-perl",
"binary_version": "1.9.16-2"
},
{
"binary_name": "liblemonldap-ng-portal-perl",
"binary_version": "1.9.16-2"
}
]
}
},
{
"ranges": [
{
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"events": [
{
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}
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}
],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.0.5+ds-2",
"2.0.6+ds-2",
"2.0.7+ds-2"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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{
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{
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},
"versions": [
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"2.0.13+ds-3",
"2.0.13+ds-3ubuntu1"
],
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},
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{
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{
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},
{
"binary_name": "liblemonldap-ng-common-perl",
"binary_version": "2.0.13+ds-3ubuntu1"
},
{
"binary_name": "liblemonldap-ng-handler-perl",
"binary_version": "2.0.13+ds-3ubuntu1"
},
{
"binary_name": "liblemonldap-ng-manager-perl",
"binary_version": "2.0.13+ds-3ubuntu1"
},
{
"binary_name": "liblemonldap-ng-portal-perl",
"binary_version": "2.0.13+ds-3ubuntu1"
}
]
}
},
{
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}
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],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.16.2+ds-1",
"2.17.1+ds-1",
"2.17.2+ds-1",
"2.17.2+ds-2",
"2.18.1+ds-1",
"2.18.2+ds-1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "lemonldap-ng",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "lemonldap-ng-fastcgi-server",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "lemonldap-ng-handler",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "lemonldap-ng-uwsgi-app",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-common-perl",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-handler-perl",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-manager-perl",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-portal-perl",
"binary_version": "2.18.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-ssoaas-apache-client-perl",
"binary_version": "2.18.2+ds-1"
}
]
}
},
{
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"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.22.2+ds-1",
"2.22.3+ds-1",
"2.23.0+ds-3",
"2.23.0+ds-4",
"2.23.2+ds-1",
"2.23.2+ds-2",
"2.23.3+ds-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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},
{
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"binary_version": "2.23.3+ds-1"
},
{
"binary_name": "lemonldap-ng-handler",
"binary_version": "2.23.3+ds-1"
},
{
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},
{
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"binary_version": "2.23.3+ds-1"
},
{
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"binary_version": "2.23.3+ds-1"
},
{
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},
{
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},
{
"binary_name": "liblemonldap-ng-ssoaas-apache-client-perl",
"binary_version": "2.23.3+ds-1"
}
]
}
},
{
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}
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],
"package": {
"name": "lemonldap-ng",
"purl": "pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.21.0+ds-3",
"2.22.0+ds-2",
"2.22.1+ds-1",
"2.22.2+ds-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "lemonldap-ng",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "lemonldap-ng-fastcgi-server",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "lemonldap-ng-handler",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "lemonldap-ng-uwsgi-app",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-common-perl",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-handler-perl",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-manager-perl",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-portal-perl",
"binary_version": "2.22.2+ds-1"
},
{
"binary_name": "liblemonldap-ng-ssoaas-apache-client-perl",
"binary_version": "2.22.2+ds-1"
}
]
}
}
],
"modified": "2026-10-17T13:01:19.552135679Z",
"provider": "osv",
"upstream": [
"CVE-2026-95811"
],
"references": [
"https://ubuntu.com/security/CVE-2026-95811",
"https://www.cve.org/CVERecord?id=CVE-2026-95811",
"https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3723"
]
},
"related_cves": [
{
"value": "CVE-2026-95811",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361682,
"published_at": "2026-09-25T02:16:00+00:00"
}