CVE-2026-55873: SeaweedFS Improper Authorization Vulnerability
MODERATECVE-2026-55873 is a MODERATE (CVSS 4.3) improper authorization vulnerability (CWE-863: Incorrect Authorization) affecting SeaweedFS libraries in the Go ecosystem. The issue involves improper authorization in the s3tables / iceberg rest management api lets a low-privileged s3 user enumerate administrator-owned table buckets. Remediation is available by upgrading affected packages to version 0.0.0-20260614205536-b13463880c1f.
CVE-2026-55873 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2026-55873
To remediate this vulnerability, upgrade all affected SeaweedFS dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/seaweedfs/seaweedfs to 0.0.0-20260614205536-b13463880c1fRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/seaweedfs/seaweedfsHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-55873, inspect your project dependencies for SeaweedFS:
inspect dependencies for github.com/seaweedfs/seaweedfsAnalyze the terminal output to locate any version of SeaweedFS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20260614205536-b13463880c1f), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In SeaweedFS, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-55873 Affected SeaweedFS Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/seaweedfs/seaweedfs
|
Go |
≥ 0.0.0-20260128085517-09bb90e8dc16
< 0.0.0-20260614205536-b13463880c1f
|
0.0.0-20260614205536-b13463880c1f
|
References
Frequently Asked Questions
What is CVE-2026-55873?
Which SeaweedFS versions are affected?
What version fixes CVE-2026-55873?
Is github.com/seaweedfs/seaweedfs affected?
What is the CVSS score of CVE-2026-55873?
What CWE is associated with CVE-2026-55873?
How can I check Go dependencies for CVE-2026-55873?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-hgpf-8634-g44c",
"modified" : "2026-08-28T22:16:43Z",
"published" : "2026-08-28T22:16:43Z",
"aliases" : [ "CVE-2026-55873" ],
"summary" : "SeaweedFS: Improper authorization in the S3Tables / Iceberg REST management API lets a low-privileged S3 user enumerate administrator-owned table buckets",
"details" : "### Summary\nSeaweedFS routes requests signed with SigV4 service `s3tables` to the S3Tables\nmanagement API. Authorization on that path collapsed account-less S3 identities\ninto the shared `admin` account and failed open, so a user holding only ordinary\nS3 `Read` credentials — and no S3Tables-specific permission — could invoke\nS3Tables management operations such as `GET /buckets` and enumerate\nadministrator-owned table bucket inventory (names and ARNs). The same handler\nbacks the Iceberg REST catalog, which was affected by the same flaw.\n\n### Impact\nAn authenticated low-privileged S3 user can cross the boundary between ordinary\nS3 object access and S3Tables management. Confirmed impact is disclosure of\nadministrator-owned table bucket inventory (bucket names and ARNs); in shared or\nmulti-tenant deployments this can reveal tenant naming and operational structure.\n\n### Affected versions\nSeaweedFS `>= 4.08, < 4.34` (the S3Tables management API was introduced in 4.08).\n\n### Patched versions\nFixed in **4.34** (#9961). Administrator status is now decided by the\n`ACTION_ADMIN` capability rather than by a collapsed `admin` account id, S3Tables\nauthorization no longer defaults to allow, and the tautological ListTableBuckets\ngate was removed. Related hardening of the same root cause landed in #9962,\n#9963, and #9971.\n\n### Workaround\nNo configuration workaround — upgrade to 4.34 or later.\n\n### Credit\nReported by **TA-MU-TA**.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/seaweedfs/seaweedfs"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0.0.0-20260128085517-09bb90e8dc16"
}, {
"fixed" : "0.0.0-20260614205536-b13463880c1f"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hgpf-8634-g44c"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-55873"
}, {
"type" : "WEB",
"url" : "https://github.com/seaweedfs/seaweedfs/pull/9961"
}, {
"type" : "WEB",
"url" : "https://github.com/seaweedfs/seaweedfs/commit/b13463880c1fa62e255c058a9228b63cc95b4b36"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/seaweedfs/seaweedfs"
}, {
"type" : "WEB",
"url" : "https://github.com/seaweedfs/seaweedfs/releases/tag/4.34"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-863" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-08-28T22:16:43Z",
"nvd_published_at" : "2026-07-08T15:16:30Z"
}
}