HIGH 8.1 Microsoft
CVE-2026-54330
Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation
Microsoft Security Update 2026-Aug: Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation
Affected Products
- azl3 ceph 18.2.2-12 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54330
- https://nvd.nist.gov/vuln/detail/CVE-2026-54330
This high severity vulnerability with a CVSS score of 8.1 was published on 2026-08-11 via Microsoft. Affected: azl3 ceph 18.2.2-12 on Azure Linux 3.0.
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