CVE-2026-45043 RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root
Attackers with ImportIAMAction can create backdoor service accounts under root, gaining full administrative access to the RustFS object storage system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45043?
CVE-2026-45043 is a critical vulnerability in rustfs, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper validation in the PUT /rustfs/admin/v3/import-iam endpoint allows a user with ImportIAMAction to create service accounts under arbitrary parent identities, including the root user (minioadmin). The endpoint accepts attacker-controlled parent, claims, accessKey, and secretKey values without enforcing privilege boundaries or sanitization. This enables privilege escalation to full administrative access using a persistent, attacker-defined credential. This vulnerability is fixed in 1.0.0-beta.2.
Which versions are affected by CVE-2026-45043?
How do I fix CVE-2026-45043?
No fix has been published for CVE-2026-45043 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45043 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45043 exists.
Sources
Also known as GHSA-566f-q62r-wcr8.