CVE-2026-21862 HIGH

CVE-2026-21862: RustFS sourceIp bypass via spoofed X-Forwarded-For/Real-IP headers

Vendor Rustfs
Product rustfs
Weakness CWE-290
Published February 3, 2026
Last update February 3, 2026
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 3, 2026 CVE published
February 3, 2026 Record updated