CVE-2026-45045 (GCVE-0-2026-45045)
Vulnerability from cvelistv5
Published
2026-07-08 19:26
Modified
2026-07-09 13:20
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-290 - Authentication Bypass by Spoofing
Summary
Fiber is an Express inspired web framework written in Go. Prior to 3.3.0 and 2.52.14, the BalancerForward proxy helper in middleware/proxy/proxy.go uses Header.Add() instead of Header.Set() when injecting X-Real-IP, allowing an attacker-supplied first X-Real-IP value to be forwarded to upstream servers for logging, rate limiting, and access control. This issue is fixed in version 3.3.0 and 2.52.14.
References
Impacted products
Vendor Product Version
gofiber fiber Version: >= 3.0.0-beta.2, < 3.3.0
Version: < 2.52.14
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