CVE-2026-33551_CVE-2026-33551

3.5 / 10

LOW

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

Description

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.

Basic Information

ID CVE-2026-33551

Source mitre

Published Apr 10, 2026 at 00:00

Modified Apr 10, 2026 at 13:50

Affected Product

Vendor OpenStack

Product Keystone

Version 14.0.0

Affected Versions OpenStack Keystone 14.0.0
OpenStack Keystone 27.0.0
OpenStack Keystone 28.0.0
OpenStack Keystone 29.0.0

CWE Classification

CWE-863

References

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    "lastseen": "",
    "description": "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.",
    "published": "2026-04-10T00:00:00.000Z",
    "modified": "2026-04-10T13:50:43.389Z",
    "type": "cve",
    "title": "CVE-2026-33551",
    "source": "mitre",
    "references": "https://bugs.launchpad.net/keystone/+bug/2142138\nhttps://security.openstack.org/ossa/OSSA-2026-005.html",
    "id": "CVE-2026-33551",
    "bulletinFamily": "",
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    "sourceData": "OpenStack Keystone 14.0.0\nOpenStack Keystone 27.0.0\nOpenStack Keystone 28.0.0\nOpenStack Keystone 29.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseSeverity": "",
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        "privilegesRequired": "",
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        "cvssV3": {
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    "product": "Keystone",
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}