# CVE-2026-66779: SAP NetWeaver Application Server ABAP reflected XSS

Source: https://junglewise.ai/threats/cve-2026-66779-sap-netweaver-application-server-abap-reflected-xss  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-66779 · Severity: medium · CVSS 6.3 · Published 2026-08-11

SAP NetWeaver Application Server ABAP contains a reflected cross-site scripting (XSS) vulnerability that allows authenticated attackers to inject malicious scripts into links. If a user clicks a crafted link, the attacker's code executes in their browser, potentially enabling account compromise, data theft, or fraud. The vulnerability requires the victim to be authenticated and click a malicious link, limiting its reach but posing a significant risk to organizations running SAP ERP systems.

Technologies: [SAP NetWeaver Application Server ABAP](https://junglewise.ai/threats/technologies/netweaver-application-server-abap). Vendors: [SAP](https://junglewise.ai/threats/vendors/sap).

## Quick answers

**Is CVE-2026-66779 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-66779 being exploited in the wild.

**How severe is CVE-2026-66779?** Medium severity, with a CVSS score of 6.3, published 11 August 2026.

**Which products and versions are affected?** SAP NetWeaver Application Server ABAP <UNKNOWN>.

**Is there a fix for CVE-2026-66779?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-66779 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-66779?** Check whether you run SAP NetWeaver Application Server ABAP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a reflected cross-site scripting (XSS) vulnerability in SAP NetWeaver Application Server ABAP. An authenticated attacker can craft a malicious link containing JavaScript or other executable code; when an authenticated victim visits the link, the input is processed and reflected in the DOM without proper sanitization, causing the injected script to execute in the victim's browser context. The attack requires both the attacker and victim to be authenticated users. Successful exploitation could result in session hijacking, credential theft, or other client-side attacks affecting confidentiality and integrity. A patch is available via SAP Security Note 3721424 on the SAP Security Patch Day (August 11, 2026).

## Affected products

- SAP NetWeaver Application Server ABAP <UNKNOWN>

## Timeline

- 2026-08-11: disclosed

## References

- [https://me.sap.com/notes/3721424](https://me.sap.com/notes/3721424)
- [https://url.sap/sapsecuritypatchday](https://url.sap/sapsecuritypatchday)

## Related threats

- [SAP Web Dispatcher and NetWeaver Application Server ABAP CSRF in administrative functionality](https://junglewise.ai/threats/cve-2026-89119-sap-web-dispatcher-and-sap-netweaver-application-server-abap)
- [SAP NetWeaver Application Server ABAP memory corruption denial of service](https://junglewise.ai/threats/cve-2026-76970-due-to-a-memory-corruption-vulnerability-in-application-server)
- [SAP NetWeaver Application Server ABAP authorization bypass](https://junglewise.ai/threats/cve-2026-76965-sap-netweaver-application-server-abap-and-abap-platform-does-not)
- [SAP NetWeaver Application Server ABAP memory corruption](https://junglewise.ai/threats/cve-2026-76964-sap-netweaver-application-server-abap-does-not-sufficiently)
- [SAP NetWeaver Application Server ABAP memory disclosure](https://junglewise.ai/threats/cve-2026-109796-sap-netweaver-application-server-abap-and-abap-platform-does-not)