Cleartext Transmission of Sensitive Information Affecting github.com/gofiber/fiber/v3/middleware/helmet package, versions <3.4.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMGOFIBERFIBERV3MIDDLEWAREHELMET-17857562
- published7 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-53624 Â (opens in a new tab)How to fix?
Upgrade github.com/gofiber/fiber/v3/middleware/helmet to version 3.4.0 or higher.
Overview
Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information due to the incorrect protocol check in the helmet middleware, which fails to set the Strict-Transport-Security header even when configured. An attacker can intercept and manipulate network traffic by performing SSL stripping or protocol downgrade attacks, potentially exposing sensitive information or session cookies over unsecured HTTP connections.