CVE-2026-73289

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.12, RustFS evaluates the ForAllValues: and ForAnyValue: set qualifiers with the negated string operators StringNotEquals, StringNotEqualsIgnoreCase, StringNotLike, ArnNotEquals, and ArnNotLike using each other's semantics because crates/policy/src/policy/function/string.rs negates the aggregate result after eval or eval_like instead of negating each request-value predicate before quantification. Partially overlapping policy and request value sets can therefore make an Allow condition grant access to an excluded principal or make a Deny guardrail fail, including policies based on jwt:groups and jwt:roles; absent keys also receive the opposite ForAllValues: and ForAnyValue: behavior. This issue is fixed in version 1.0.0-beta.12.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb
https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12
https://github.com/rustfs/rustfs/security/advisories/GHSA-v9cp-qfw9-9pfp

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-12 15:18

Updated : 2026-09-09 21:02

NVD link : CVE-2026-73289

Mitre link : CVE-2026-73289

CVE.ORG link : CVE-2026-73289

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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