CVE-2026-54330
CVE-2026-54330: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.2
High [CVE-2026-54330] RGW SigV4 verifier allows attachment of arbitrary unsigned x-amz-* headers leading to privilege escalation
CVE-2026-54330Source published Source updated
Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway (RGW) SigV4 handler does not reject requests that carry x-amz-* headers absent from the signed header set, allowing anyone holding a presigned URL to attach arbitrary unsigned x-amz-* headers that RGW will honor. AWS S3 requires every x-amz-* header on a SigV4 request to be signed and rejects requests bearing additional unsigned headers, but RGW validates only the headers listed in X-Amz-SignedHeaders and ignores any extra ones, so they take effect without being covered by the signature. By adding such headers to a presigned PUT URL, an attacker can grant themselves more capabilities than the URL's signer intended and escalate…
- Affected products in this advisory
- Red Hat Ceph Storage 4
- Red Hat Ceph Storage 5
- Red Hat Ceph Storage 6
- Red Hat Ceph Storage 7
2 more entries in the full advisory.
- Source-reported affected versions
- < 20.2.4
- < 19.2.6
- Source-reported fixed versions
- 20.2.4
- 19.2.6
- Mitigation guidance
- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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