CVE-2026-21862

HIGH

Crates.io Rustfs < 1.0.0-alpha.78 - Authentication Bypass by Spoofing

Title source: rule

Description

RustFS is a distributed object storage system built in Rust. Prior to version alpha.78, IP-based access control can be bypassed: get_condition_values trusts client-supplied X-Forwarded-For/X-Real-Ip without verifying a trusted proxy, so any reachable client can spoof aws:SourceIp and satisfy IP-allowlist policies. This issue has been patched in version alpha.78.

References (1)

[Vendor Advisory] https://github.com/rustfs/rustfs/security/advisories/GHSA-fc6g-2gcp-2qrq

Scores

CVSS v3 7.5

EPSS 0.0004

EPSS Percentile 13.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-290

Status published

Products (2)

crates.io/rustfs 0 - 1.0.0-alpha.78crates.io

rustfs/rustfs 1.0.0 alpha1 (49 CPE variants)

Published Feb 03, 2026

Tracked Since Feb 18, 2026