CVE-2026-58230 in Approuter
Summary
by MITRE • 08/11/2026
SAP Approuter does not sufficiently validate certain token content under specific configurations. An unauthenticated attacker could send a specially crafted token to cause sensitive credential material to be sent to an attacker-controlled destination. The attack complexity is high due to non-default preconditions required in the target environment. This results in a high impact on confidentiality and a low impact on integrity and availability.
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Analysis
by VulDB Data Team • 08/11/2026
The vulnerability in SAP Approuter represents a critical authorization bypass issue that exploits improper token validation mechanisms within the application routing component. This flaw exists specifically under certain configuration conditions where the system fails to adequately validate token content, creating an avenue for unauthorized access to sensitive credential information. The vulnerability is classified as a weakness in authentication and authorization controls, aligning with CWE-287 which addresses improper authentication scenarios. Attackers must possess specific environmental knowledge and meet non-default preconditions to exploit this vulnerability, making the attack complexity high but not impossible given the right circumstances.
The technical execution of this attack requires an unauthenticated attacker to craft and submit a malicious token that can trick the Approuter into forwarding sensitive credential material to a destination controlled by the attacker. This occurs because the system's token validation logic does not sufficiently examine the content or structure of tokens, particularly when certain configuration parameters are set in a specific way. The flaw essentially allows for credential leakage through improper access control mechanisms, where legitimate authentication flows are bypassed or manipulated to redirect sensitive information. The attack vector leverages the trust relationship between components within the SAP ecosystem, exploiting a weakness in the token handling process that should normally validate and sanitize all incoming authentication tokens before processing them.
The operational impact of this vulnerability extends significantly beyond simple credential theft, as it compromises the confidentiality of sensitive data flowing through the SAP environment. Organizations running affected Approuter configurations face potential exposure of user credentials, system access tokens, and other privileged information that could enable further attacks within their network infrastructure. The low impact on integrity and availability indicates that while attackers cannot directly modify system data or cause service disruption, they can extract valuable credential material that may lead to more severe consequences including lateral movement, privilege escalation, and persistent access to enterprise resources. This vulnerability aligns with ATT&CK technique T1566 which covers credential harvesting through various means, specifically targeting the exploitation of authentication mechanisms.
Mitigation strategies should focus on implementing proper token validation controls and ensuring that SAP Approuter configurations follow security best practices. Organizations must verify their current configuration settings to identify whether they are susceptible to this vulnerability and apply necessary patches or workarounds provided by SAP. Network segmentation and monitoring of unusual traffic patterns involving the Approuter component can help detect potential exploitation attempts. Regular security assessments should include verification of token handling mechanisms, particularly in environments where legacy configurations might be present. Additionally, implementing principle of least privilege controls and regular credential rotation processes will reduce the potential damage from successful exploitation attempts, while maintaining audit trails to track any unauthorized access attempts against the affected system components.