CVE-2026-33551: CWE-863 Incorrect Authorization in OpenStack Keystone
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.
AI Analysis
Technical Summary
CVE-2026-33551 is an authorization bypass vulnerability in OpenStack Keystone affecting versions 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials, which should have limited permissions, can be exploited via the EC2 credential creation API to generate EC2/S3 credentials with the full S3 permissions of the parent user. This occurs only in environments that use restricted application credentials combined with the EC2/S3 compatibility API (swift3 / s3api). The vulnerability is classified under CWE-863 (Incorrect Authorization).
Potential Impact
An authenticated user with minimal privileges (reader role) can escalate permissions by creating EC2/S3 credentials that carry the full S3 permissions of the parent user. This effectively bypasses the role restrictions intended for restricted application credentials, potentially allowing unauthorized access to S3 resources. There is no impact on confidentiality, but integrity is affected due to unauthorized privilege escalation. Availability is not impacted. No known exploits in the wild have been reported.
Mitigation Recommendations
A patch is available for this vulnerability. Since this affects OpenStack Keystone as a cloud service, the vendor typically manages remediation server-side. Users should verify with the OpenStack vendor advisory for the application of the official fix or upgrade to patched versions (26.1.1 or later, 27.0.0+, 28.0.0+, 29.0.0+ as applicable). Deployments not using restricted application credentials with the EC2/S3 compatibility API are not affected. Patch status is confirmed as available; apply updates promptly to mitigate this issue.
CVE-2026-33551: CWE-863 Incorrect Authorization in OpenStack Keystone
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33551 is an authorization bypass vulnerability in OpenStack Keystone affecting versions 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials, which should have limited permissions, can be exploited via the EC2 credential creation API to generate EC2/S3 credentials with the full S3 permissions of the parent user. This occurs only in environments that use restricted application credentials combined with the EC2/S3 compatibility API (swift3 / s3api). The vulnerability is classified under CWE-863 (Incorrect Authorization).
Potential Impact
An authenticated user with minimal privileges (reader role) can escalate permissions by creating EC2/S3 credentials that carry the full S3 permissions of the parent user. This effectively bypasses the role restrictions intended for restricted application credentials, potentially allowing unauthorized access to S3 resources. There is no impact on confidentiality, but integrity is affected due to unauthorized privilege escalation. Availability is not impacted. No known exploits in the wild have been reported.
Mitigation Recommendations
A patch is available for this vulnerability. Since this affects OpenStack Keystone as a cloud service, the vendor typically manages remediation server-side. Users should verify with the OpenStack vendor advisory for the application of the official fix or upgrade to patched versions (26.1.1 or later, 27.0.0+, 28.0.0+, 29.0.0+ as applicable). Deployments not using restricted application credentials with the EC2/S3 compatibility API are not affected. Patch status is confirmed as available; apply updates promptly to mitigate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-03-22T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 69d862041cc7ad14da50d937
Added to database: 4/10/2026, 2:35:48 AM
Last enriched: 4/17/2026, 12:26:25 PM
Last updated: 5/25/2026, 6:01:55 AM
Views: 95
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