CVE-2026-54330
- Source
- https://cve.org/CVERecord?id=CVE-2026-54330
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54330.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-54330
- Aliases
-
- BIT-ceph-2026-54330
- GHSA-rmjq-ffrm-j6vj
- Downstream
AZL (1)
DEBIAN (1)
ECHO (1)
MGASA (1)
RHSA (1)
UBUNTU (1)
- Published
- 2026-08-27T20:59:24Z
- Modified
- 2026-10-22T10:32:00Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation
- Details
-
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 their privileges. This issue is fixed in versions 20.2.4 and 19.2.6.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-347" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54330.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54330.json
- https://github.com/ceph/ceph/security/advisories/GHSA-rmjq-ffrm-j6vj
- https://nvd.nist.gov/vuln/detail/CVE-2026-54330
- https://github.com/ceph/ceph/commit/5837aa8e60471128dbb672b0ff6f1b1feebe08a7
- https://github.com/ceph/ceph/commit/5978c866d4a0812fbb024745c4f1e79aaecd6c6a
Affected packages
Git / github.com/ceph/ceph
Affected ranges
- Type
- GIT
- Repo
- https://github.com/ceph/ceph
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "19.0.0" }, { "fixed": "19.2.6" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "20.0.0" }, { "fixed": "20.2.4" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "5837aa8e60471128dbb672b0ff6f1b1feebe08a7" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "5978c866d4a0812fbb024745c4f1e79aaecd6c6a" } ], "source": "REFERENCES_COMMIT" } ] }