CPANSA-Lemonldap-NG-Handler-2026-95811: Lemonldap-NG-Handler vulnerability
| Publisher |
giterlizzi |
Document category |
csaf_security_advisory |
| Initial release date |
2026-09-25T00:00:00 |
Engine |
CSAF Perl Toolkit 0.26 |
| Current release date |
2026-09-25T00:00:00 |
Build Date |
|
| Current version |
1 |
Status |
final |
| CVSS v3.1 Base Score |
6.5
|
Severity |
Medium
|
| Original language |
|
Language |
en |
| Also referred to |
|
Vulnerability Description
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.
Vulnerabilities
CVE-2026-95811
Vulnerability DescriptionLemonldap::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.
| Weakness |
CWE-180 : Incorrect Behavior Order: Validate Before Canonicalize
|
Product status
Known affected
| Product |
Score |
| Lemonldap-NG-Handler greater than or equal 2.0.0 and less than 2.16.10 |
|
| Lemonldap-NG-Handler greater than or equal 2.17.0 and less than 2.21.6 |
|
| Lemonldap-NG-Handler greater than or equal 2.22.0 and less than 2.23.4 |
|
Fixed
- Lemonldap-NG-Handler greater than or equal 2.16.10 and less than 2.17.0
- Lemonldap-NG-Handler greater than or equal 2.21.6 and less than 2.22.0
- Lemonldap-NG-Handler greater than or equal 2.23.4
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
Revision history
| Version |
Date of the revision |
Summary of the revision |
| 1 |
Fri Sep 25 00:00:00 2026 |
First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/