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CVE-2026-55188

RustFS: ListRemoteTargetHandler authorization bypass leaks replication target credentials

Published: Jun 26, 2026Updated: Jun 27, 2026 Sources: CVE List NVDCWE-200
8.2HIGH
NVD MITRE
EPSS Score
0.2%
Top 92.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-200CWE-522CWE-862CWE-863

Affected Products

rustfs
oss-project
rustfsLibrary
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

5 techniques
Collection
Credential Access
Initial Access
View detailed technique mapping

References

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

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