What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-30 · updated 2026-10-08
• Weakness: CWE-22

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 products

• seaweedfs: before 4.34 — fixed in 4.34

How to fix

Upgrade to a fixed version: seaweedfs 4.34. Check the vendor advisory for mitigations.

References

• https://github.com/geo-chen/oss/blob/main/seaweedfs.md
• https://github.com/seaweedfs/seaweedfs/commit/0345658ea8e7c6a3948ad190634b00866ec244c9
• https://github.com/seaweedfs/seaweedfs/pull/9931
• https://github.com/seaweedfs/seaweedfs/releases/tag/4.34
• https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv
• https://www.vulncheck.com/advisories/seaweedfs-cross-bucket-object-deletion-via-deleteobjects-request-body-keys
• https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv

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