{"id":"CVE-2026-72815","revision":"796e8416582f4260a96de9df700454d2","records":[{"revision":"796e8416582f4260a96de9df700454d2","observedAt":"2026-10-25T15:19:03.401+00:00","statement":{"source":"nvd","id":"CVE-2026-72815","aliases":[],"title":"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 co…","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.","state":0,"publishedAt":"2026-08-14T12:16:44.507+00:00","modifiedAt":"2026-10-08T16:17:35.65+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.9,"severity":"MEDIUM"}],"references":["https://github.com/go-chi/chi/security/advisories/GHSA-3fxj-6jh8-hvhx","https://www.vulncheck.com/advisories/go-chi-chi-ip-spoofing-via-x-forwarded-for-header"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72815","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-290"],"productCriteria":[],"sourceDates":{"published":"2026-08-14T12:16:44.507","lastModified":"2026-10-08T16:17:35.650"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-72815","identifiers":["CVE-2026-72815"]},"retained":false,"historicalAffected":[]}],"coverage":[]}