CVE-2026-66771: SAP SE SAPUI5

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

SAPUI5 allows a key user with content adaptation privileges to inject malicious script content into persisted application changes. When another user subsequently opens the adapted application, the injected script executes in the victim's browser session. Successful exploitation could allow the attacker to access sensitive session data and perform unauthorized actions on behalf of the victim, resulting in a high impact on confidentiality and integrity. There is no impact on availability.

Affected products

• SAP SE SAPUI5: version 754 only; version 755 only; version 756 only; version 757 only; version 758 only; version 816 only

Published 2026-08-11. Last modified 2026-08-26.