Skip to main content
Public proof of conceptFix available

CVE-2026-95811

A public proof of concept exists; no exploitation attested.

  • Published2026-09-25
  • WeaknessCWE-180 · CWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-09-2502:16CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As CPANSec, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Lemonldap-NG-Handlerother versions: not affected

    https://cpan.org/modules

    Affected
    • ≥ 2.0.0, < 2.16.10fixed in 2.16.10custom
    • ≥ 2.17.0, < 2.21.6fixed in 2.21.6custom
    • ≥ 2.22.0, < 2.23.4fixed in 2.23.4custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-09-25

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • lemonldap-ngUbuntu:26.10all versions · no fixed version listed
  • lemonldap-ngUbuntu:26.04:LTSall versions · no fixed version listed
  • lemonldap-ngUbuntu:24.04:LTSall versions · no fixed version listed
  • lemonldap-ngUbuntu:22.04:LTSall versions · no fixed version listed
  • lemonldap-ngUbuntu:20.04:LTSall versions · no fixed version listed
  • lemonldap-ngUbuntu:18.04:LTSall versions · no fixed version listed
  • lemonldap-ngUbuntu:16.04:LTSall versions · no fixed version listed
  • lemonldap-ngDebian:14all versions · fixed in 2.23.4+ds-1

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-95811 Red Hat Product Security

    lemonldap-ng: lemonldap-ng: Access control bypass via non-normalized request URI

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Published
2026-09-25
Last Modified
2026-09-26
NVD status
Deferred
GitHub Advisory
GHSA-3rh3-f3vh-mgjh

Frequently asked questions

What is 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. 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.

Is CVE-2026-95811 actively exploited?

A proof-of-concept exploit exists for CVE-2026-95811, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-95811?

CVE-2026-95811 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Running lemonldap-ng? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record