CVE-2026-53624 gofiber CVE debrief

Who should care

Users of Fiber framework versions prior to 3.4.0 should review and update their configurations to ensure proper HSTS settings. This includes verifying HSTSMaxAge configuration and ensuring proper HSTS settings. Operators, platform administrators, vulnerability management teams, and security teams may be impacted.

Technical summary

The helmet middleware in Fiber, an Express-inspired web framework written in Go, failed to set the Strict-Transport-Security (HSTS) response header even when HSTSMaxAge was configured. This was due to a check for 'https' protocol using c.Protocol() instead of c.Scheme(). The issue was fixed in version 3.4.0. Users of affected versions should review and update their configurations. This includes verifying HSTSMaxAge configuration and ensuring proper HSTS settings. The vulnerability has security implications for users of affected Fiber versions. Defenders should verify HSTS settings and review the official advisory for affected scope and vendor guidance.

Defensive priority

Medium priority for users of affected Fiber versions due to potential security implications of HSTS bypass.

Recommended defensive actions

• Review and update Fiber framework to version 3.4.0 or later
• Verify HSTSMaxAge configuration and ensure proper HSTS settings
• Monitor for potential security implications of HSTS bypass
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Evidence from official CVE and NVD sources indicate a medium severity vulnerability in Fiber framework versions prior to 3.4.0. The issue arises from the helmet middleware's incorrect protocol check, leading to a potential security risk. Defenders should verify HSTS settings and review the official advisory for affected scope and vendor guidance.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.