---
id: CVE-2026-66778
title: >-
  SAP Approuter does not sufficiently sanitize certain request headers before
  forwarding traffic to internal components
summary: >-
  SAP Approuter does not sufficiently sanitize certain request headers before
  forwarding traffic to internal components. An unauthenticated attacker could
  send a specially crafted request to obtain limited unauthorized access to
  informatio…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-644
vendor: sap
product: approuter
affected:
  - approuter < 23.0.0
patched:
  - approuter 23.0.0
published: '2026-08-11'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:21:52.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-66778'
references:
  - url: 'https://me.sap.com/notes/3786038'
    label: cna@sap.com
  - url: 'https://url.sap/sapsecuritypatchday'
    label: cna@sap.com
tags:
  - nvd
epss: 0.00358
epssPercentile: 0.26816
ingestedAt: '2026-09-08T21:11:12.275Z'
---

## Overview

SAP Approuter does not sufficiently sanitize certain request headers before forwarding traffic to internal components. An unauthenticated attacker could send a specially crafted request to obtain limited unauthorized access to information. This results in a low impact on confidentiality. There is no impact on integrity and availability.

## Affected

- `approuter < 23.0.0`

## Remediation

Upgrade past the affected range:

- `approuter 23.0.0`