{
  "cveId": "CVE-2026-92289",
  "url": "https://patchblox.com/security/cve/CVE-2026-92289",
  "summary": "CVE-2026-92289 is fixed in 11 products on 1 platform, first by FEDORA-2026-33DCAB55B4, released September 25, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "lemonldap-ng: Lemonldap::NG::Portal versions from 2.23.0 before 2.23.4 for Perl allow a PKCE bypass for public Relying Parties in \u0022...",
  "description": "Lemonldap::NG::Portal versions from 2.23.0 before 2.23.4 for Perl allow a PKCE bypass for public Relying Parties in \u0022PKCE or secret\u0022 mode because checkEndPointAuthenticationCredentials does not verify the client secret.  With oidcRPMetaDataOptionsRequirePKCE set to 2, the authorization endpoint issues a code even when the request carries no code_challenge, and token() admits the exchange as long as a challenge was stored or an authentication method was returned for the caller. checkEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the method deduced from the request, so any Basic or form credential satisfies the secret branch. validatePKCEChallenge() then passes, because neither a challenge nor a verifier is present.  An attacker who intercepts an authorization code issued to a public Relying Party can exchange it for the user\u0027s access, ID and refresh tokens by replaying the client_id with an arbitrary secret, which is the attack PKCE prevents. Dynamic client registration creates every Relying Party in this mode.",
  "published": "2026-09-25T01:16:48Z",
  "severity": "critical",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.00537,
  "epssPercentile": 0.45523,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "lemonldap-ng",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.21.2\u002Bds-1\u002Bdeb13u4",
      "fix": "DEBIAN-CVE-2026-92289",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-92289",
      "released": "2026-09-27T20:04:15Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng",
      "release": "Debian 14",
      "fixedVersion": "2.23.4\u002Bds-1",
      "fix": "DEBIAN-CVE-2026-92289",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-92289",
      "released": "2026-09-27T20:04:15Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-common",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-doc",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-fastcgi-server",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-handler",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-manager",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-portal",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-selinux",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-test",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "lemonldap-ng-uwsgi-app",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    },
    {
      "platform": "linux",
      "product": "perl-Lemonldap-NG-SSOaaS-Apache-Client",
      "release": "Fedora 43",
      "fixedVersion": "2.23.4-1.fc43",
      "fix": "FEDORA-2026-33DCAB55B4",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-33dcab55b4",
      "released": "2026-09-25T08:14:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}