CVE-2026-109793
Received Received - Intake

SAP NetWeaver Server Denial of Service via Header Injection

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: SAP SE

Description
SAP NetWeaver Application Server ABAP and SAP Web Dispatcher do not sufficiently validate certain header values processed during inbound request handling. An unauthenticated attacker could send a specially crafted request to cause the affected process to become unavailable.This results in a high impact on availability. There is no impact on confidentiality and integrity.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-109793
EUVD
EUVD-2026-120678

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
sap netweaver_application_server_abap *
sap web_dispatcher *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

SAP NetWeaver Application Server ABAP and SAP Web Dispatcher do not properly validate certain header values in incoming requests. This allows an unauthenticated attacker to send a specially crafted request that disrupts the affected process, causing it to become unavailable. The main impact is on system availability, with no effect on data confidentiality or integrity.

Detection Guidance

Detecting this vulnerability requires monitoring for unusual request patterns or crashes in SAP NetWeaver Application Server ABAP and SAP Web Dispatcher. Check logs for malformed header values or repeated crashes. SAP provides tools like SAP Solution Manager for monitoring. No specific commands are provided in the available context.

Impact Analysis

This vulnerability could lead to denial-of-service conditions, making SAP services unavailable. If exploited, it may cause downtime for critical business applications relying on SAP NetWeaver or Web Dispatcher, disrupting operations and productivity.

Compliance Impact

While this vulnerability does not directly impact data confidentiality or integrity, prolonged unavailability of SAP services could lead to non-compliance with regulations requiring timely access to systems or data, such as GDPR's data processing principles or HIPAA's availability requirements.

Mitigation Strategies

Apply the latest security patches from SAP as referenced in SAP Note 3808627 to address the insufficient header validation issue.

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