CVE-2026-66771 Cross Site Scripting (XSS) vulnerability in SAPUI5
An attacker with content adaptation privileges can inject malicious scripts into SAPUI5 applications, allowing them to steal session data and perform unauthorized actions on behalf of other users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-66771?
CVE-2026-66771 is a medium-severity cross-site scripting vulnerability in SAP_SE SAPUI5, published on 11 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-66771?
How do I fix CVE-2026-66771?
No fix has been published for CVE-2026-66771 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-66771 being exploited?
There is no known exploitation of CVE-2026-66771 in the wild and no public exploit code.
Sources
Also known as GHSA-v37p-2wmc-8vqg.