go-chi chi before 5.3.0 IP Spoofing via RealIP Middleware
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.
CVE-2026-72816
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72816
chi
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "go-chi",
"product": "chi",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "5.3.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.3.0",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/go-chi/chi/v5",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-72816
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #12834 · Revision 1
- Added to Heist Feed
- Publisher date