Vulnerability in Gofiber Fiber
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 uses Header.Add() instead of Header.Set() when injecting X-Real-IP, allowing an attacker-su…
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Gofiber Fiber — versions >= 3.0.0-beta.2, < 3.3.0, < 2.52.14
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-45045?
- CVE-2026-45045 is a medium-severity vulnerability in Gofiber Fiber, classified under Authentication Bypass by Spoofing. CVSS score: 5.3/10. Published 2026-07-08.
- How severe is CVE-2026-45045?
- Medium severity. CVSS v3 base score is 5.3 out of 10.