Improper Verification of Cryptographic Signature Affecting ceph/ceph package, versions [,19.2.6)[20.0.0,20.2.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-CEPHCEPH-20074897
- published24 Sept 2026
- disclosed19 Aug 2026
- creditUnknown
Introduced: 19 Aug 2026
CVE-2026-54330 (opens in a new tab)How to fix?
Upgrade ceph/ceph to version 19.2.6, 20.2.4 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature incomplete verification of the SigV4 process. An attacker can gain unauthorized read and write access to S3 objects by attaching arbitrary unsigned x-amz-* headers to requests using a presigned PUT URL, thereby escalating privileges beyond those intended by the original signer.