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PYSEC-2026-202

Vulnerability from pysec - Published: 2026-04-10 03:16 - Updated: 2026-06-06 09:31
VLAI
Details

An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Impacted products
Name purl
keystone pkg:pypi/keystone
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "keystone",
        "purl": "pkg:pypi/keystone"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "14.0.0"
            },
            {
              "fixed": "26.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "14.0.0",
        "14.0.1",
        "14.1.0",
        "14.2.0",
        "15.0.0",
        "15.0.0.0rc1",
        "15.0.0.0rc2",
        "15.0.1",
        "16.0.0",
        "16.0.0.0rc1",
        "16.0.0.0rc2",
        "16.0.1",
        "16.0.2",
        "17.0.0",
        "17.0.0.0rc1",
        "17.0.0.0rc2",
        "17.0.1",
        "18.0.0",
        "18.0.0.0rc1",
        "18.1.0",
        "19.0.0",
        "19.0.0.0rc1",
        "19.0.0.0rc2",
        "19.0.1",
        "20.0.0",
        "20.0.0.0rc1",
        "20.0.1",
        "21.0.0",
        "21.0.0.0rc1",
        "21.0.1",
        "22.0.0",
        "22.0.0.0rc1",
        "22.0.1",
        "22.0.2",
        "23.0.0",
        "23.0.0.0rc1",
        "23.0.1",
        "23.0.2",
        "24.0.0",
        "24.0.0.0rc1",
        "24.1.0",
        "25.0.0",
        "25.0.0.0rc1",
        "26.0.0",
        "26.0.0.0rc1",
        "26.1.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33551",
    "GHSA-4phw-6824-6cfp"
  ],
  "details": "An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user\u0027s S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.",
  "id": "PYSEC-2026-202",
  "modified": "2026-06-06T09:31:39.395371Z",
  "published": "2026-04-10T03:16:02.723Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://bugs.launchpad.net/keystone/+bug/2142138"
    },
    {
      "type": "FIX",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/07/12"
    },
    {
      "type": "FIX",
      "url": "https://security.openstack.org/ossa/OSSA-2026-005.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-4phw-6824-6cfp"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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