CVE-2026-33551

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Summary

CVECVE-2026-33551
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-10 03:16:02 UTC
Updated2026-04-13 15:02:06 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 3.5 LOW from [email protected]

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

EPSS: 0.000200000 probability, percentile 0.054270000 (date 2026-04-15)

Problem Types: CWE-863 | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.5LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
3.1CNADECLARED3.5LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenStack Keystone affected 14.0.0 26.1.1 semver Not specified
CNA OpenStack Keystone affected 27.0.0 semver Not specified
CNA OpenStack Keystone affected 28.0.0 semver Not specified
CNA OpenStack Keystone affected 29.0.0 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/04/07/12 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
bugs.launchpad.net/keystone/+bug/2142138 134c704f-9b21-4f2e-91b3-4a467353bcc0 bugs.launchpad.net
security.openstack.org/ossa/OSSA-2026-005.html [email protected] security.openstack.org
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