{"id":"CVE-2026-94368","published":"2026-09-21T12:17:29.010","lastModified":"2026-09-21T21:17:21.680","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.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","cwes":["CWE-347"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-94368","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2537364","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw in noobaa-core's signature verification logic allows attackers to add unsigned headers, enabling unauthorized CopyObject operations and data copying.","exploitability":"Exploitation requires a valid presigned PUT URL but is relatively straightforward due to the oversight in header validation.","blast_radius":"If exploited, this can lead to unauthorized access and copying of sensitive data across the entire storage system.","remediation":"Update noobaa-core to the latest version that addresses this vulnerability.","tags":["auth-bypass","data-leak","storage"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:17:20.802Z"}}