RustFS sourceIp bypass via spoofed X-Forwarded-For/Real-IP headers_CVE-2026-21862

7.7 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-21862

Source GitHub_M

Published Feb 3, 2026 at 16:06

Affected Product

Vendor rustfs

Product rustfs

Version < alpha.78

Affected Versions rustfs rustfs < alpha.78

CWE Classification

CWE-290

References

github.com /rustfs/rustfs/security/advisories/GHSA-fc6g-2gcp-2qrq

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    "published": "2026-02-03T16:06:08.929Z",
    "modified": "2026-02-03T16:06:08.929Z",
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