A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system.
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History
Tue, 22 Sep 2026 00:15:00 +0000
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Mon, 21 Sep 2026 21:30:00 +0000
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Mon, 21 Sep 2026 12:00:00 +0000
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| Description | A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system. | |
| Title | Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-copy-source header | |
| First Time appeared |
Redhat
Redhat openshift Data Foundation |
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| Weaknesses | CWE-347 | |
| CPEs | cpe:/a:redhat:openshift_data_foundation:4 | |
| Vendors & Products |
Redhat
Redhat openshift Data Foundation |
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cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-09-21T11:45:12.776Z
Updated: 2026-09-25T06:45:02.664Z
Reserved: 2026-09-21T11:13:36.872Z
Link: CVE-2026-94368
Updated: 2026-09-21T19:40:22.590Z
Status : Awaiting Analysis
Published: 2026-09-21T12:17:29.010
Modified: 2026-09-22T19:37:36.747
Link: CVE-2026-94368