UBUNTU-CVE-2026-45045 (CVE-2026-45045)

Vulnerability from osv_ubuntu – Published: 2026-07-08 20:16 – Updated: 2026-07-08 20:16 – Source website
VLAI
Details

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.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-gofiber-fiber-dev",
            "binary_version": "3.5.0-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "golang-github-gofiber-fiber",
        "purl": "pkg:deb/ubuntu/golang-github-gofiber-fiber@3.5.0-4?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.0-1",
        "3.4.0-1",
        "3.5.0-1",
        "3.5.0-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-gofiber-fiber-v2-dev",
            "binary_version": "2.52.13-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "golang-github-gofiber-fiber-v2",
        "purl": "pkg:deb/ubuntu/golang-github-gofiber-fiber-v2@2.52.13-3?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.52.13-2",
        "2.52.13-3"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-45045",
  "modified": "2026-07-08T20:16:00Z",
  "published": "2026-07-08T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-45045"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45045"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/commit/1403cc8292da3220e9316960b4030cc722a0f396"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/commit/33c9501288ab47a429c8b5e701493f0c3c0af37d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/pull/4260"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/pull/4495"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/releases/tag/v2.52.14"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/releases/tag/v3.3.0"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-gcfq-8gqf-4876"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-45045"
  ]
}



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