CVE-2026-72815: medium-severity vulnerability in go-chi chi
go-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header
Published · Updated
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33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.9epss 0.5%
from disclosure to weapon27 days
Published on NVDAug 14
1st PoC+27d
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.
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
Affected products
go-chi · chipublic PoCs found — 1
githubgithub.com/Saku0512/CVE-2026-72815-poc★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — go-chi chi
In the same product, most dangerous first.
CVE-2025-71405MEDIUMgo-chi chi before v5.2.2 Open Redirect via RedirectSlashesEPSS 0.4%CVE-2026-72816MEDIUMgo-chi chi before 5.3.0 IP Spoofing via RealIP MiddlewareEPSS 0.3%CVE-2026-122132MEDIUMgo-chi chi 5.2.2 through 5.5.0 Open Redirect via RedirectSlashes MiddlewareEPSS 0.3%CVE-2026-118681MEDIUMgo-chi chi before 5.5.0 Authentication Bypass via SupressNotFound MiddlewareEPSS 0.2%CVE-2026-72817MEDIUMgo-chi chi 0.9.0 before 5.3.0 IP Spoofing via X-Forwarded-ForEPSS 0.2%CVE-2026-114437MEDIUMChi Client IP Spoofing in ClientIPFromXFF via X-Forwarded-ForEPSS 0.1%