CVE-2026-95811
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
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.5
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
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.
- Record
CVE-2026-95811- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-863, CWE-180
- Updated
- 2026-11-02
EUVDEUVD-2026-86497
6.5
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.
- Record
EUVD-2026-86497- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-3rh3-f3vh-mgjh
6.5
Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0...
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.
- Record
GHSA-3rh3-f3vh-mgjh- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-180
- Updated
- 2026-11-02
NVD
6.5
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.
- Record
CVE-2026-95811- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-180, CWE-863
- Updated
- 2026-11-02
OSV
6.5
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
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.
- Record
CVE-2026-95811- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-180, CWE-863
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-95811
6.5
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.
- Record
DEBIAN-CVE-2026-95811- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-95811
6.5
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.
- Record
UBUNTU-CVE-2026-95811- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
lemonldap-ngDebian:12 |
before 2.16.1+ds-deb12u10, plus listed versions 2.16.1+ds-22.16.1+ds-deb12u12.16.1+ds-deb12u22.16.1+ds-deb12u32.16.1+ds-deb12u4 Show 5 moreShow less2.16.1+ds-deb12u52.16.1+ds-deb12u62.16.1+ds-deb12u72.16.1+ds-deb12u82.16.1+ds-deb12u9 |
2.16.1+ds-deb12u10 |
lemonldap-ngDebian:13 |
before 2.21.2+ds-1+deb13u4, plus listed versions 2.21.2+ds-12.21.2+ds-1+deb13u12.21.2+ds-1+deb13u22.21.2+ds-1+deb13u3 |
2.21.2+ds-1+deb13u4 |
lemonldap-ngDebian:14 |
before 2.23.4+ds-1, plus listed versions 2.21.2+ds-12.21.2+ds-22.21.3+ds-12.21.3+ds-1~bpo12+12.21.3+ds-1~bpo13+1 Show 19 moreShow less2.22.0+ds-12.22.0+ds-22.22.0+ds-2~bpo13+12.22.1+ds-12.22.1+ds-1~bpo13+12.22.2+ds-12.22.2+ds-1~bpo13+12.22.3+ds-12.22.3+ds-1~bpo13+12.23.0+ds-12.23.0+ds-22.23.0+ds-32.23.0+ds-3~bpo13+12.23.0+ds-42.23.1+ds-12.23.2+ds-12.23.2+ds-1~bpo13+12.23.2+ds-22.23.3+ds-1 |
2.23.4+ds-1 |
lemonldap-ngUbuntu:16.04:LTS |
All versions, plus listed versions 1.3.3-11.4.6-11.4.6-21.4.6-3 |
None known |
lemonldap-ngUbuntu:18.04:LTS |
All versions, plus listed versions 1.9.10-11.9.13-21.9.14-11.9.15-11.9.16-2 |
None known |
lemonldap-ngUbuntu:20.04:LTS |
All versions, plus listed versions 2.0.5+ds-22.0.6+ds-22.0.7+ds-2 |
None known |
lemonldap-ngUbuntu:22.04:LTS |
All versions, plus listed versions 2.0.11+ds-42.0.13+ds-32.0.13+ds-3ubuntu1 |
None known |
lemonldap-ngUbuntu:24.04:LTS |
All versions, plus listed versions 2.16.2+ds-12.17.1+ds-12.17.2+ds-12.17.2+ds-22.18.1+ds-12.18.2+ds-1 |
None known |
lemonldap-ngUbuntu:26.10 |
All versions, plus listed versions 2.22.2+ds-12.22.3+ds-12.23.0+ds-32.23.0+ds-42.23.2+ds-12.23.2+ds-22.23.3+ds-1 |
None known |
lemonldap-ngUbuntu:26.04:LTS |
All versions, plus listed versions 2.21.0+ds-32.22.0+ds-22.22.1+ds-12.22.2+ds-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-95811 is a medium vulnerability (CVSS 6.5) in lemonldap-ng, published September 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.55%, the 46th percentile. Fixed in lemonldap-ng 2.16.1+ds-deb12u10.
References
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/3723
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.16.10
cve.org/CVERecord?id=CVE-2020-24660
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3723
Show 9 moreShow less
lists.debian.org/debian-lts-announce/2026/09/msg00032.html
nvd.nist.gov/vuln/detail/CVE-2026-95811
github.com/advisories/GHSA-3rh3-f3vh-mgjh
cpan.org/modules
github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95811.json
gitlab.ow2.org/lemonldap-ng/lemonldap-ng
security-tracker.debian.org/tracker/CVE-2026-95811
ubuntu.com/security/CVE-2026-95811
cve.org/CVERecord?id=CVE-2026-95811