{
  "cveId": "CVE-2026-33540",
  "url": "https://patchblox.com/security/cve/CVE-2026-33540",
  "summary": "CVE-2026-33540 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-33540, released April 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "docker-registry: Distribution is a toolkit to pack, ship, store, and deliver container content",
  "description": "Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used without validating that it matches the upstream registry host. As a result, an attacker-controlled upstream (or an attacker with MitM position to the upstream) can cause distribution to send the configured upstream credentials via basic auth to an attacker-controlled realm URL. This vulnerability is fixed in 3.1.0.",
  "published": "2026-04-06T15:17:10Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00285,
  "epssPercentile": 0.21125,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "distribution",
      "release": "sles 15.6",
      "fixedVersion": "3.1.1-150400.9.41.1",
      "fix": "SUSE-SU-2026:4212-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4212-1",
      "released": "2026-09-16T11:52:48Z"
    },
    {
      "platform": "linux",
      "product": "distribution",
      "release": "sles 15.7",
      "fixedVersion": "3.1.1-150400.9.41.1",
      "fix": "SUSE-SU-2026:4212-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4212-1",
      "released": "2026-09-16T11:52:48Z"
    },
    {
      "platform": "linux",
      "product": "docker-registry",
      "release": "Debian 14",
      "fixedVersion": "2.8.3\u002Bds1-3",
      "fix": "DEBIAN-CVE-2026-33540",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33540",
      "released": "2026-04-06T15:17:10Z"
    },
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.0.20260723T184607-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21483-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21483-1",
      "released": "2026-07-30T09:09:47Z"
    }
  ],
  "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"
  }
}