Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation

🔗 CVE IDs covered (1)

🎯 Affected products1

• azl3 ceph 18.2.2-12 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 18.2.2-13

🔗 References (2)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54330
• patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade