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Vulnerability record · CVE-2026-55188 · published 26 June 2026

CVE-2026-55188: Information exposure vulnerability

RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.1 until 1.0.0-beta.9, RustFS contains an authorization bypass in the bucket replication admin API. The ListRemoteTargetHandler handler for listing remote replication targets only checks whether request credentials exist, but does not verify that the caller has replication or administrator permissions. As a result, an authenticated user with no effective bucket or admin permissions can list remote replication target configuration for a bucket. Because the returned BucketTarget objects include remote target credentials, this can disclose replication access keys and secret keys. This vulnerability is fixed in 1.0.0-beta.9.

8.2 CVSS 3.1 High EPSS 0.30% · top 80.0% CWE-200 · Information exposureCWE-522 · Insufficiently protected credentials Deferred
8.2CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
27 Jun 2026Last modified by NVD

Description

RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.1 until 1.0.0-beta.9, RustFS contains an authorization bypass in the bucket replication admin API. The ListRemoteTargetHandler handler for listing remote replication targets only checks whether request credentials exist, but does not verify that the caller has replication or administrator permissions. As a result, an authenticated user with no effective bucket or admin permissions can list remote replication target configuration for a bucket. Because the returned BucketTarget objects include remote target credentials, this can disclose replication access keys and secret keys. This vulnerability is fixed in 1.0.0-beta.9.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

References

LinkTags
https://github.com/rustfs/rustfs/security/advisories/GHSA-796f-j7xp-hwf4
https://github.com/rustfs/rustfs/security/advisories/GHSA-796f-j7xp-hwf4

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Source: NIST National Vulnerability Database (record CVE-2026-55188), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.