High 7.7Published Feb 3, 2026

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

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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It affects rustfs. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-290
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rustfs rustfs rustfs:rustfs (from the name)	before alpha.78	CNA record
rustfs rustfs rustfs:rustfs	1.0.0; 1.0.0; 1.0.0; 1.0.0; 1.0.0; 1.0.0; 1.0.0; 1.0.0; and 69 more ranges	NVD

References

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-fc6g-2gcp-2qrq	x-refsource-confirm, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.