GHSA-PR87-24G5-HPHV

Vulnerability from github – Published: 2026-09-07 15:33 – Updated: 2026-09-08 09:35
VLAI
Details

A flaw was found in 389 Directory Server. During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. A variant using a valid low-privileged account's own successful bind instead of an anonymous one is also possible.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-18922"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-07T15:17:31Z",
    "severity": "CRITICAL"
  },
  "details": "A flaw was found in 389 Directory Server. During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. A variant using a valid low-privileged account\u0027s own successful bind instead of an anonymous one is also possible.",
  "id": "GHSA-pr87-24g5-hphv",
  "modified": "2026-09-08T09:35:37Z",
  "published": "2026-09-07T15:33:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18922"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511388"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18922"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64811"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64804"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64793"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64792"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64791"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64790"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64789"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64785"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64784"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64783"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64781"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64780"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64779"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64778"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:64776"
    },
    {
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    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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