Path Traversal Vulnerability in SeaweedFS S3 Gateway
CVE-2026-58372

7.2HIGH

Key Information:

Vendor

Seaweedfs

Status
Seaweedfs
Vendor
CVE Published:
30 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-58372?

SeaweedFS, prior to version 4.34, has a path traversal vulnerability in its S3 gateway, specifically within the DeleteMultipleObjectsHandler. This flaw enables authenticated S3 users with write permissions to one bucket to execute deletions on arbitrary objects across different tenant buckets. By exploiting the vulnerability, attackers can craft DeleteObjects XML requests containing '../' sequences, allowing them to bypass standard authorization controls. The underlying issue arises from the validateRequestPath middleware, which fails to authenticate request-body keys, only analyzing URL path variables. This oversight leads to a confused deputy condition; hence, attackers can manipulate the file path to initiate deletions that should not be permitted.

Affected Version(s)

seaweedfs 0 < 4.34

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-58372 - Proof of Concept

References

https://github.com/seaweedfs/seaweedfs/releases/tag/4.34
release-notes
https://github.com/seaweedfs/seaweedfs/pull/9931
relatedissue-tracking
https://github.com/seaweedfs/seaweedfs/commit/0345658ea8e...
patch

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.