UBUNTU-CVE-2026-95811

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Source
https://ubuntu.com/security/CVE-2026-95811
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-95811
Upstream
Published
2026-09-25T02:16:00Z
Modified
2026-10-17T13:01:19Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:16.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.3.3-1
1.4.6-1
1.4.6-2
1.4.6-3

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:18.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9.10-1
1.9.13-2
1.9.14-1
1.9.15-1
1.9.16-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "lemonldap-ng",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:20.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.5+ds-2
2.0.6+ds-2
2.0.7+ds-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "lemonldap-ng",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "lemonldap-ng-fastcgi-server",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "lemonldap-ng-handler",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "lemonldap-ng-uwsgi-app",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "liblemonldap-ng-common-perl",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "liblemonldap-ng-handler-perl",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "liblemonldap-ng-manager-perl",
            "binary_version":  "2.0.7+ds-2"
        },
        {
            "binary_name":  "liblemonldap-ng-portal-perl",
            "binary_version":  "2.0.7+ds-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:22.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.11+ds-4
2.0.13+ds-3
2.0.13+ds-3ubuntu1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "lemonldap-ng",
            "binary_version":  "2.0.13+ds-3ubuntu1"
        },
        {
            "binary_name":  "lemonldap-ng-fastcgi-server",
            "binary_version":  "2.0.13+ds-3ubuntu1"
        },
        {
            "binary_name":  "lemonldap-ng-handler",
            "binary_version":  "2.0.13+ds-3ubuntu1"
        },
        {
            "binary_name":  "lemonldap-ng-uwsgi-app",
            "binary_version":  "2.0.13+ds-3ubuntu1"
        },
        {
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:24.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

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

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:26.04:LTS
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.21.0+ds-3
2.22.0+ds-2
2.22.1+ds-1
2.22.2+ds-1

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"
Ubuntu:26.10
lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
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

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "lemonldap-ng",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "lemonldap-ng-fastcgi-server",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "lemonldap-ng-handler",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "lemonldap-ng-uwsgi-app",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "liblemonldap-ng-common-perl",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "liblemonldap-ng-handler-perl",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "liblemonldap-ng-manager-perl",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "liblemonldap-ng-portal-perl",
            "binary_version":  "2.23.3+ds-1"
        },
        {
            "binary_name":  "liblemonldap-ng-ssoaas-apache-client-perl",
            "binary_version":  "2.23.3+ds-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95811.json"