{
  "cveId": "CVE-2026-86219",
  "url": "https://patchblox.com/security/cve/CVE-2026-86219",
  "summary": "CVE-2026-86219 is fixed in 2 products on 1 platform, first by libauthen-sasl-perl 2.2000-1ubuntu0.1, released September 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "libauthen-sasl-perl: Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverifie...",
  "description": "Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step.  server_start generates a fresh nonce and sends it in the challenge, and nothing later compares that value against the nonce the client returns. server_step derives the expected digest from the client\u0027s own parameters, so a response verifies whenever its digest matches the nonce it carries. The count table it also checks is keyed on the client-supplied nonce and starts empty in each new server object, so a captured first response, carrying \u0060nc=00000001\u0060, passes that too. RFC 2831 defines the nonce in the response as the value the server sent in the preceding challenge.  An attacker who observes one successful \u0060qop=auth\u0060 exchange can replay the captured response against a later session for the same service, host, realm and user, and authenticate as that user without knowing the password.",
  "published": "2026-09-06T11:17:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00468,
  "epssPercentile": 0.40724,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Debian 14",
      "fixedVersion": "2.2000-2",
      "fix": "DEBIAN-CVE-2026-86219",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-86219",
      "released": "2026-09-12T12:34:33Z"
    },
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.1600-1ubuntu0.18.04.1~esm1",
      "fix": "libauthen-sasl-perl 2.1600-1ubuntu0.18.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libauthen-sasl-perl-2.1600-1ubuntu0.18.04.1-esm1",
      "released": "2026-10-01T20:52:35Z"
    },
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.1600-1ubuntu0.20.04.1~esm1",
      "fix": "libauthen-sasl-perl 2.1600-1ubuntu0.20.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libauthen-sasl-perl-2.1600-1ubuntu0.20.04.1-esm1",
      "released": "2026-10-01T20:52:37Z"
    },
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.1600-1.1ubuntu0.1",
      "fix": "libauthen-sasl-perl 2.1600-1.1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libauthen-sasl-perl-2.1600-1.1ubuntu0.1",
      "released": "2026-10-01T20:52:43Z"
    },
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.1700-1ubuntu0.1",
      "fix": "libauthen-sasl-perl 2.1700-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libauthen-sasl-perl-2.1700-1ubuntu0.1",
      "released": "2026-10-01T20:52:46Z"
    },
    {
      "platform": "linux",
      "product": "libauthen-sasl-perl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.2000-1ubuntu0.1",
      "fix": "libauthen-sasl-perl 2.2000-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libauthen-sasl-perl-2.2000-1ubuntu0.1",
      "released": "2026-09-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Authen-SASL",
      "release": "amzn 2023",
      "fixedVersion": "2.16-23.amzn2023.0.4",
      "fix": "ALAS2023-2026-3090",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3090",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-Authen-SASL",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.170.0-160000.4.1",
      "fix": "OPENSUSE-SU-2026:21946-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21946-1",
      "released": "2026-09-24T09:10:44Z"
    },
    {
      "platform": "linux",
      "product": "perl-Authen-SASL",
      "release": "sles 15.6",
      "fixedVersion": "2.16-150000.1.9.1",
      "fix": "SUSE-SU-2026:4302-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4302-1",
      "released": "2026-09-23T11:37:22Z"
    },
    {
      "platform": "linux",
      "product": "perl-Authen-SASL",
      "release": "sles 15.7",
      "fixedVersion": "2.16-150000.1.9.1",
      "fix": "SUSE-SU-2026:4302-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4302-1",
      "released": "2026-09-23T11:37:22Z"
    },
    {
      "platform": "linux",
      "product": "perl-Authen-SASL",
      "release": "sles 16.0",
      "fixedVersion": "2.170.0-160000.4.1",
      "fix": "SUSE-SU-2026:23913-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23913-1",
      "released": "2026-09-24T09:10:39Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}