SAP Approuter OAuth2 Login Flow improper authorization

Summaryinfo

A vulnerability labeled as critical has been found in SAP Approuter. The impacted element is an unknown function of the component OAuth2 Login Flow. Executing a manipulation can lead to improper authorization. This vulnerability is registered as CVE-2026-44745. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in SAP Approuter (the affected version unknown) and classified as critical. This vulnerability affects an unknown part of the component OAuth2 Login Flow. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

SAP Approuter does not properly validate incoming request headers during the OAuth2 login flow under certain configurations. This allows an unauthenticated remote attacker to craft a malicious link which, when clicked by a victim, could lead to unauthorized access. Successful exploitation results in a high impact to the confidentiality and integrity with no impact on the availability of the application.

The advisory is shared for download at me.sap.com. This vulnerability was named CVE-2026-44745 since 05/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/14/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Router Operating System

Vendor

• SAP

Name

• Approuter

License

• commercial

Website

• Vendor: https://www.sap.com/

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