CVE-2026-73286
RustF: Request headers can populate server-derived IAM condition keys, letting a caller satisfy identity-based policy conditions
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.12, RustFS get_condition_values folds attacker-controlled request headers from HeaderMap into server-derived userid, username, principaltype, groups, versionid, signatureversion, jwt:, and ldap: condition keys, allowing authenticated callers to satisfy identity-based policy conditions. This issue is fixed in version 1.0.0-beta.12.
| CWE | CWE-863 |
| Vendor | rustfs |
| Product | rustfs |
| Published | Aug 12, 2026 |
| Last Updated | Aug 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
rustfs / rustfs
< 1.0.0-beta.12
References
github.com: https://github.com/rustfs/rustfs/security/advisories/GHSA-6r96-hmgc-726c github.com: https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb github.com: https://github.com/rustfs/rustfs/blob/380ed40b471887014fe21d069b61df9eacca074b/.agents/skills/security-advisory-lessons/references/advisory-patterns.md?plain=1#L45 github.com: https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12