SB2026041494 - Two vulnerabilities in SAP NetWeaver AS ABAP

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2026-27680)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to inject malicious style information.

The vulnerability exists due to CSS injection in SAP NetWeaver Application Server ABAP when rendering content. A remote attacker can trick the victim into opening crafted content to inject malicious style information.

2) Open redirect (CVE-ID: CVE-2026-34257)

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to redirect users to an arbitrary site and disclose limited information.

The vulnerability exists due to open redirect in SAP NetWeaver Application Server ABAP when handling requests. A remote attacker can trick the victim into opening a crafted link to redirect users to an arbitrary site and disclose limited information.

User interaction is required.

Remediation

Install update from vendor's website.

References

• https://support.sap.com/en/my-support/knowledge-base/security-notes-news/april-2026.html
• https://me.sap.com/notes/3665042
• https://me.sap.com/notes/3692004