Vulnerability · Published Jun 30, 2026 · Assigned by VulnCheck

CVE-2026-58372SeaweedFS < 4.34 - Cross-Bucket Object Deletion via DeleteObjects Request-Body Keys

High 8.1

In plain English

A high-severity path traversal in seaweedfs from seaweedfs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.9%top 41.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SeaweedFS before 4.34 contains a path traversal vulnerability in the S3 gateway DeleteMultipleObjectsHandler that allows authenticated S3 principals with write access to a single bucket to delete arbitrary objects in other tenants' buckets by supplying object keys containing ../ sequences in the DeleteObjects XML request body. Attackers can bypass authorization controls through a confused deputy condition, as the validateRequestPath middleware only inspects URL-captured path variables and never examines request-body keys, allowing the filer path to collapse directory traversal sequences and resolve deletions outside the authorized bucket.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260526080459-dd1b4287899e	GHSA-w62w-66v9-vvgv
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260526080459-dd1b4287899e	GO-2026-6221

Affected products (as reported)

Vendor	Product	Versions
seaweedfs	seaweedfs	0 – before 4.34

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References

Release Notes release-notes
Fix PR related, issue-tracking
Fix Commit patch
Prior advisory (CVE-2026-54917) - incompletely fixed
Researcher Disclosure technical-description, exploit
https://www.vulncheck.com/advisories/seaweedfs-cross-bucket-object-deletion-via-deleteobjects-request-body-keys third-party-advisory