Quick answers
- Is CVE-2026-45043 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45043 being exploited in the wild.
- How severe is CVE-2026-45043?
- Informational severity, with a CVSS score of 9.3, published 29 May 2026.
- Which products and versions are affected?
- RustFS RustFS < 1.0.0-beta.2.
- Is there a fix for CVE-2026-45043?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-45043 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-45043?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A privilege escalation vulnerability exists in the RustFS `import-iam` endpoint due to improper validation of service account definitions provided in ZIP-supplied JSON payloads. The `ImportIam` handler in `rustfs/src/admin/handlers/user.rs` fails to validate the `parent` field, allowing an attacker to associate new service accounts with the root user (`minioadmin`). Additionally, the endpoint does not sanitize `claims` or enforce privilege boundaries on `accessKey` and `secretKey` values. An attacker with `ImportIAMAction` privileges can exploit this to provision persistent credentials with `consoleAdmin` policies, effectively gaining full administrative control. This bypasses the security checks present in the standard `AddServiceAccount` flow. The issue is resolved in version 1.0.0-beta.2.
Affected products
- RustFS RustFS < 1.0.0-beta.2
Timeline
- 2026-05-09: advisory: GitHub Security Advisory published
- 2026-05-29: disclosed: CVE published to NVD