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CVE-2026-55188— RustFS: ListRemoteTargetHandler authorization bypass leaks replication target credentials

Quick assessment

Affected
rustfs rustfs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rustfs是RustFS组织开源的一个高性能对象存储系统。 RustFS 1.0.0-alpha.1版本至1.0.0-beta.8版本存在安全漏洞，该漏洞源于bucket replication admin API中的授权绕过问题，可能导致经过身份验证但无有效权限的用户列出存储桶的远程复制目标配置，并泄露复制访问密钥和秘密密钥。

CVSS 8.2 · High EPSS 0.30% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustfs rustfs >= 1.0.0-alpha.1, <= 1.0.0-beta.8 affected
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I. Basic Information for CVE-2026-55188

Vulnerability Information
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Vulnerability Title
RustFS: ListRemoteTargetHandler authorization bypass leaks replication target credentials
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
RustFS 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rustfs是RustFS组织开源的一个高性能对象存储系统。 RustFS 1.0.0-alpha.1版本至1.0.0-beta.8版本存在安全漏洞，该漏洞源于bucket replication admin API中的授权绕过问题，可能导致经过身份验证但无有效权限的用户列出存储桶的远程复制目标配置，并泄露复制访问密钥和秘密密钥。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustfs rustfs >= 1.0.0-alpha.1, <= 1.0.0-beta.8 -

II. Public POCs for CVE-2026-55188

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9654 chars
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III. Intelligence Information for CVE-2026-55188

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Vendor Advisories for CVE-2026-55188 (1)

Same Patch Batch · rustfs · 2026-06-26 · 4 CVEs total

CVE-2026-49991 8.6 HIGH RustFS Snowball Auto-Extract: Path Traversal allows cross-bucket object injection
CVE-2026-55189 7.7 HIGH RustFS: FTP frontend skips IAM authorization on object reads
CVE-2026-55838 4.3 MEDIUM RustFS: Missing admin authorization on /rustfs/admin/v3/metrics allows any authenticated u

IV. Related Vulnerabilities

Same product: rustfs
Same vendor: rustfs
Same weakness: CWE-200

V. Comments for CVE-2026-55188

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