X-Backend-Server header exposes server information

Description

The target website returns the X-Backend-Server header which includes potentially internal/hidden IP addresses or hostnames. By exposing these values, attackers may attempt to circumvent security proxies and access these hosts directly.

Remediation

Consult your proxy/load balancer documentation or provider on how to disable revealing the X-Backend-Server header value.

Details

ID	Aggregated	CWE	Type	Risk
16.4	true	16	Passive	Info

Help & feedback

Docs

Edit this page to fix an error or add an improvement in a merge request.
Create an issue to suggest an improvement to this page.

Product

Create an issue if there's something you don't like about this feature.
Propose functionality by submitting a feature request.
Join First Look to help shape new features.

Feature availability and product trials

View pricing to see all GitLab tiers and features, or to upgrade.
Try GitLab for free with access to all features for 30 days.

Get Help

If you didn't find what you were looking for, search the docs.

If you want help with something specific and could use community support, post on the GitLab forum.

For problems setting up or using this feature (depending on your GitLab subscription).

Request support