CVEvulnerability
CVE-2026-45045
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-08
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-290
Description
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.
Affected configurations
• gofiber fiber (< 2.52.14)
• gofiber fiber (>= 3.0.0 < 3.3.0)
Related
Weakness · CWE (1)
- CWE-290 Authentication Bypass by Spoofing weakness
References
- https://github.com/gofiber/fiber/commit/1403cc8292da3220e9316960b4030cc722a0f396 Patch
- https://github.com/gofiber/fiber/commit/33c9501288ab47a429c8b5e701493f0c3c0af37d Patch
- https://github.com/gofiber/fiber/pull/4260 Issue Tracking, Patch
- https://github.com/gofiber/fiber/pull/4495 Issue Tracking, Patch
- https://github.com/gofiber/fiber/releases/tag/v2.52.14 Release Notes
- https://github.com/gofiber/fiber/releases/tag/v3.3.0 Release Notes
- https://github.com/gofiber/fiber/security/advisories/GHSA-gcfq-8gqf-4876 Exploit, Vendor Advisory