---
id: CVE-2026-73289
title: RustFS is a distributed object storage system built in Rust
summary: >-
  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, StringN…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-863
published: '2026-08-12'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:02:22.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73289'
references:
  - url: >-
      https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb
    label: security-advisories@github.com
  - url: 'https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12'
    label: security-advisories@github.com
  - url: 'https://github.com/rustfs/rustfs/security/advisories/GHSA-v9cp-qfw9-9pfp'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00413
epssPercentile: 0.32723
ingestedAt: '2026-09-09T21:22:45.531Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.