Vulnerability · Published Jun 26, 2026 · Assigned by GitHub_M
CVE-2026-55188RustFS: ListRemoteTargetHandler authorization bypass leaks replication target credentials
High 8.2
In plain English
A high-severity information exposure in rustfs from rustfs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-200, CWE-522, CWE-862, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
References
- https://github.com/rustfs/rustfs/security/advisories/GHSA-796f-j7xp-hwf4 x_refsource_CONFIRM