CVE-2026-54917
SeaweedFS: Path traversal in the S3 and Iceberg REST gateways allows cross-bucket access
Description
SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With path cleaning disabled, a .. segment inside the URL survives routing, so a request such as `GET /bucket-A/../evil-bucket/key`, is matched as bucket=bucket-A, object=../evil-bucket/key. The captured object key is then joined into a filer path with util.JoinPath (S3) / path.Join (Iceberg), which collapse the .. server-side, so the actual read or write lands in evil-bucket. This vulnerability is fixed in 4.30.
INFO
Published Date :
June 25, 2026, 7:16 p.m.
Last Modified :
June 29, 2026, 9:21 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update SeaweedFS to version 4.30 or newer.
- Verify gateway configurations for security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-54917.
| URL | Resource |
|---|---|
| https://github.com/seaweedfs/seaweedfs/pull/9687 | Issue Tracking Mitigation |
| https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv | Exploit Patch Vendor Advisory |
| https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-54917 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-54917
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54917 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-54917 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:seaweedfs:seaweedfs:*:*:*:*:*:*:*:* versions up to (excluding) 4.30 Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/pull/9687 Types: Issue Tracking, Mitigation Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv Types: Exploit, Patch, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv Types: Exploit, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 25, 2026
Action Type Old Value New Value Added Reference https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv Added SSVC {'id': 'CVE-2026-54917', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-25T19:04:26.709044Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'seaweedfs', 'product': 'seaweedfs', 'versions': [{'status': 'affected', 'version': '< 4.30'}]}] Added Description SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With path cleaning disabled, a .. segment inside the URL survives routing, so a request such as `GET /bucket-A/../evil-bucket/key`, is matched as bucket=bucket-A, object=../evil-bucket/key. The captured object key is then joined into a filer path with util.JoinPath (S3) / path.Join (Iceberg), which collapse the .. server-side, so the actual read or write lands in evil-bucket. This vulnerability is fixed in 4.30. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-22 Added Reference https://github.com/seaweedfs/seaweedfs/pull/9687 Added Reference https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv