CVE-2026-66771
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
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.
Risk Assessment
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. Availability is unaffected.
Recommendation
Update SAPUI5 and implement measures to prevent script injection, such as input sanitization and Content Security Policy.
Other vulnerabilities in SAPUI5
See all- CVE-2026-44767Medium
The setThemeRoot() function fails to enforce the sap-allowed-theme-origins allowlist. An attacker can store and use a controlled absolute cross-origin URL to construct a <link rel=stylesheet> element, even without the <meta name=sap-allowed-theme-origins> tag. The bypass is also reachable via the ?sap-themeRoot URL parameter.
- CVE-2026-34258Medium
In SAPUI5 (Search UI), an unauthenticated attacker can manipulate specific URL parameters in the Search UI to include malicious content. Successful exploitation may mislead victim users into clicking and accessing attacker-controlled pages rendered by the application. This vulnerability has a low impact on confidentiality with no effect on integrity and availability.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS