CVE-2026-73286 PUBLISHED

RustF: Request headers can populate server-derived IAM condition keys, letting a caller satisfy identity-based policy conditions

Assigner: GitHub_M
Reserved: 11.08.2026 Published: 12.08.2026 Updated: 12.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	rustfs
Product	rustfs
Versions	Version < 1.0.0-beta.12 is affected

References

Problem Types

CWE-863: Incorrect Authorization CWE