AUGUST 24, 2026
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Case File

CVE-2026-55874

HIGH · CVSS 7.7 EPSS 0.33% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

The vulnerability in SeaweedFS allows authenticated users to exploit the S3 API gateway by using dot-dot path segments in the X-Amz-Copy-Source header, enabling them to access and read objects from other buckets beyond their scope. This poses a significant risk of unauthorized data exposure, particularly for organizations using the affected versions prior to 4.34. Administrators of SeaweedFS deployments should prioritize upgrading to version 4.34 to mitigate this high-severity issue.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55874
Severity
HIGH
CVSS
7.7
EPSS
0.33%

Original NVD Description

SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.