FKIE_CVE-2026-95811

Vulnerability from fkie_nvd - Published: 2026-09-25 02:16 - Updated: 2026-09-26 16:16
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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.
References
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/3723
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.16.10
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://www.cve.org/CVERecord?id=CVE-2020-24660
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2026/09/msg00032.html
134c704f-9b21-4f2e-91b3-4a467353bcc0https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3723
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Lemonldap::NG::Handler"
          ],
          "packageName": "Lemonldap-NG-Handler",
          "packageURL": "pkg:cpan/Lemonldap-NG-Handler",
          "programFiles": [
            "lib/Lemonldap/NG/Handler/Main/Run.pm"
          ],
          "programRoutines": [
            {
              "name": "Lemonldap::NG::Handler::Main::Run::run"
            },
            {
              "name": "Lemonldap::NG::Handler::Main::Run::grant"
            },
            {
              "name": "Lemonldap::NG::Handler::Main::Run::getLevel"
            },
            {
              "name": "Lemonldap::NG::Handler::Main::Run::isUnprotected"
            }
          ],
          "repo": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng",
          "versions": [
            {
              "lessThan": "2.16.10",
              "status": "affected",
              "version": "2.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "2.21.6",
              "status": "affected",
              "version": "2.17.0",
              "versionType": "custom"
            },
            {
              "lessThan": "2.23.4",
              "status": "affected",
              "version": "2.22.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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.\n\nThe handler matches each vhost\u0027s 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\u0027s default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike.\n\nOnly 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."
    }
  ],
  "id": "CVE-2026-95811",
  "lastModified": "2026-09-26T16:16:39.087",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-95811",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-25T13:53:01.823535Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-25T02:16:54.677",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/3723"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.16.10"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-24660"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2026/09/msg00032.html"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3723"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-180"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}



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