CVE-2026-27680 CSS Injection vulnerability in SAP NetWeaver Application Server ABAP

Low 3.1 Published 14 May 2026 Updated 14 May 2026

An attacker can inject CSS into SAP NetWeaver pages, leading to low-impact confidentiality breaches when users interact with the affected content.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-27680?

CVE-2026-27680 is a low-severity cross-site scripting vulnerability in Sap Netweaver Application Server Abap, published on 14 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Due to improper input handling under certain conditions, SAP NetWeaver Application Server ABAP allows an attacker to inject custom Cascading Style Sheets (CSS) data into a web page served by the application. When a user accesses or clicks the affected page, the injected CSS is executed. As a result, the issue has a low impact on confidentiality, while integrity and availability are not impacted.

Weakness: CWE-276

Which versions are affected by CVE-2026-27680?

It affects 1 product.

Products include Sap Netweaver Application Server Abap.

How do I fix CVE-2026-27680?

No fix has been published for CVE-2026-27680 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-2026-27680 being exploited?

There is no known exploitation of CVE-2026-27680 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-4wqv-v86p-8q8g.