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CVE-2026-72816— go-chi chi before 5.3.0 IP Spoofing via RealIP Middleware

CVSS 6.5 · Medium EPSS 0.22% · P13

Affected Version Matrix 2

VendorProductVersion RangeStatus
go-chichi< 5.3.0affected
5.3.0unaffected
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I. Basic Information for CVE-2026-72816

Vulnerability Information
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Vulnerability Title
go-chi chi before 5.3.0 IP Spoofing via RealIP Middleware
Source: CVE Program / CVE List V5
Vulnerability Description
go-chi/chi through 5.2.1 contains an IP spoofing vulnerability in the RealIP middleware (middleware/realip.go). The realIP() function reads client-controlled headers (True-Client-IP, X-Real-IP, and X-Forwarded-For) and overwrites r.RemoteAddr without verifying that the request originated from a trusted proxy. Attackers can supply arbitrary IP addresses in these headers to bypass IP-based access controls, evade rate limiting and geo-IP restrictions, and pollute audit logs. Fixed in 5.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
go-chichi 0 ~ 5.3.0 -

II. Public POCs for CVE-2026-72816

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III. Intelligence Information for CVE-2026-72816

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Vendor Advisories for CVE-2026-72816 (2)

Same Patch Batch · go-chi · 2026-08-14 · 4 CVEs total

CVE-2026-728156.9 MEDIUMgo-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header
CVE-2026-728176.5 MEDIUMgo-chi chi 0.9.0 before 5.3.0 IP Spoofing via X-Forwarded-For
CVE-2025-714055.1 MEDIUMgo-chi chi before v5.2.2 Open Redirect via RedirectSlashes

IV. Related Vulnerabilities

Same product: chi
Same vendor: go-chi
Same weakness: CWE-290

V. Comments for CVE-2026-72816

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