Description
go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.
Published: 2026-08-14
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 18 Aug 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Aug 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Go-chi
Go-chi chi
Vendors & Products Go-chi
Go-chi chi

Fri, 14 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
Description go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.
Title go-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header
Weaknesses CWE-290
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T01:55:20.208Z

Reserved: 2026-08-10T15:12:16.754Z

Link: CVE-2026-72815

cve-icon Vulnrichment

Updated: 2026-08-18T01:55:15.569Z

cve-icon NVD

Status : Received

Published: 2026-08-14T12:16:44.507

Modified: 2026-08-18T02:17:27.727

Link: CVE-2026-72815

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-14T12:45:17Z

Weaknesses