CVE-2026-3635

medium Red Hat
CVSS v3 Base Score
6.1
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack Characteristics
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: March 23, 2026 (52 days ago)
Last Modified: March 23, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in fastify. When the trustProxy option is configured with a restrictive trust function, such as a specific IP, a subnet, a hop count or a custom function, the request.protocol and request.host getters read X-Forwarded-Proto and X-Forwarded-Host headers from any connection, including connections from untrusted IPs. This allows an attacker connecting directly to the server, bypassing the proxy, to spoof both the protocol and host seen by the application.

CWE

CWE-348

Affected Products

Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat OpenShift AI (RHOAI)Red Hat OpenShift Dev Spaces

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 cna.openjsf.org 🔗 github.com