CVE-2026-94368

7.1 HIGH

Published 2026-09-21 · Updated 2026-09-21

AI risk analysis

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.
Prioritized remediation: Update noobaa-core to the latest version that addresses this vulnerability.

auth-bypassdata-leakstorage

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

Weaknesses

CWE-347

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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