CVE-2025-26654 is a vulnerability classified under CWE-319 (Cleartext Transmission of Sensitive Information) affecting SAP Commerce Cloud (Public Cloud), specifically version COM_CLOUD 2211. The core issue arises because the platform does not permit disabling unencrypted HTTP (port 80) outright; instead, it performs an HTTP to HTTPS redirect. While subsequent communications occur securely over HTTPS, the initial HTTP request before the redirect is transmitted in cleartext. If a client is configured to send sensitive information (such as authentication tokens, credentials, or personal data) in this initial request, that data can be intercepted or modified by an attacker positioned on the network path, such as in a man-in-the-middle (MITM) attack. The vulnerability impacts the confidentiality and integrity of data but does not affect availability. The CVSS v3.1 vector (AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) indicates that the attack requires adjacent network access with high attack complexity, no privileges, and no user interaction, affecting confidentiality and integrity with unchanged scope. No patches or exploits are currently reported, but the issue stems from architectural constraints in the platform's handling of HTTP traffic. This vulnerability highlights the risk of relying solely on HTTP to HTTPS redirection without the ability to enforce HTTPS-only connections from the outset.

The primary impact of CVE-2025-26654 is the potential exposure of sensitive data transmitted in the initial HTTP request before redirection to HTTPS. This can lead to unauthorized disclosure of confidential information such as login credentials, session tokens, or personal customer data, compromising user privacy and organizational security. Integrity may also be affected if an attacker modifies the initial request, potentially leading to unauthorized actions or data corruption. Although the vulnerability does not affect system availability, the breach of confidentiality and integrity can result in significant reputational damage, regulatory penalties (especially under data protection laws like GDPR), and financial losses. Organizations relying on SAP Commerce Cloud for e-commerce operations may face increased risk of data breaches, fraud, and customer trust erosion. The attack complexity is high due to the need for network proximity, but in environments with untrusted or public networks, the risk is more pronounced. The inability to disable HTTP entirely limits the enforcement of strict transport security policies, increasing the attack surface.

To mitigate CVE-2025-26654, organizations should implement the following specific measures: 1) Configure client applications and browsers to avoid sending sensitive information in the initial HTTP request; ensure all sensitive data is transmitted only after HTTPS is established. 2) Employ HTTP Strict Transport Security (HSTS) with preload lists where possible to enforce HTTPS connections and prevent downgrade attacks. 3) Use network-level protections such as VPNs or secure tunnels to protect traffic on untrusted networks, reducing the risk of interception. 4) Monitor network traffic for signs of man-in-the-middle attacks or unusual HTTP requests containing sensitive data. 5) Educate developers and administrators on secure coding and configuration practices to avoid embedding sensitive data in URLs or headers sent over HTTP. 6) Engage with SAP support to track any forthcoming patches or configuration options that may allow disabling HTTP entirely or improving redirect security. 7) Consider deploying web application firewalls (WAFs) to detect and block suspicious HTTP traffic patterns. These targeted actions go beyond generic advice by focusing on client configuration, network security, and proactive monitoring tailored to the specific nature of this vulnerability.