This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-45045 →
UBUNTU-CVE-2026-45045
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 us...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:26.10
golang-github-gofiber-fiber
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.10
golang-github-gofiber-fiber-v2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report ubuntu.com
- report cve.org
- report github.com
- report github.com
- report github.com
- report github.com
- report github.com
- report github.com
- report github.com