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CVE-2026-53624— Fiber: HSTS header never set in helmet middleware due to incorrect protocol check

Quick assessment

Affected
gofiber fiber
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fiber Fiber是Fiber团队的一款开发框架。 Fiber 3.4.0之前版本存在加密问题漏洞，该漏洞源于helmet中间件（middleware/helmet/helmet.go）检查协议时使用c.Protocol()而非c.Scheme()，未设置Strict-Transport-Security响应标头，可能导致信息泄露。

CVSS 4.8 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
gofiber fiber < 3.4.0 affected
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I. Basic Information for CVE-2026-53624

Vulnerability Information
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Vulnerability Title
Fiber: HSTS header never set in helmet middleware due to incorrect protocol check
Source: CVE Program / CVE List V5
Vulnerability Description
Fiber is an Express inspired web framework written in Go. Prior to 3.4.0, the helmet middleware in middleware/helmet/helmet.go never sets the Strict-Transport-Security response header even when HSTSMaxAge is configured because it checks c.Protocol() for https instead of c.Scheme(). This issue is fixed in version 3.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Fiber 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fiber Fiber是Fiber团队的一款开发框架。 Fiber 3.4.0之前版本存在加密问题漏洞，该漏洞源于helmet中间件（middleware/helmet/helmet.go）检查协议时使用c.Protocol()而非c.Scheme()，未设置Strict-Transport-Security响应标头，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gofiber fiber < 3.4.0 -

II. Public POCs for CVE-2026-53624

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III. Intelligence Information for CVE-2026-53624

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Patches & Fixes for CVE-2026-53624 (2)

Vendor Advisories for CVE-2026-53624 (1)

Vendor Pages for CVE-2026-53624 (1)

Same Patch Batch · gofiber · 2026-07-08 · 3 CVEs total

CVE-2026-45045 5.3 MEDIUM Fiber: X-Real-IP Spoofing via Header.Add() in BalancerForward
CVE-2026-44332 5.3 MEDIUM Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

IV. Related Vulnerabilities

Same product: fiber
Same vendor: gofiber
Same weakness: CWE-319

V. Comments for CVE-2026-53624

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