CVE-2026-72815CWE-290

CVE-2026-72815

published August 14, 2026

CVSS
6.9
EPSS
0%
Percentile
41.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
6.9 · NONE
CVSS v4.0
6.9 · 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
EPSS
0.00495 · 41.5th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-08-14T16:16Z
References (3)
https://github.com/go-chi/chi/security/advisories/GHSA-3fxj-6jh8-hvhx · [email protected]https://www.vulncheck.com/advisories/go-chi-chi-ip-spoofing-via-x-forwarded-for-header · [email protected]https://github.com/go-chi/chi/security/advisories/GHSA-3fxj-6jh8-hvhx · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 AUG 11:35Z
    go-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header
    cvelistv5