CVE-2026-40128
SAP NetWeaver Application Server Java (Web Container) contains a critical path‑traversal flaw (CVE‑2026‑40128) that lets an unauthenticated attacker send a specially crafted HTTP logon request. By manipulating file‑inclusion parameters, the attacker can include and process arbitrary files, potentially viewing or modifying sensitive data or disrupting system availability. The vulnerability carries a CVSS v3.1 base score of 9.0 (Critical).
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
SAP NetWeaver Application Server Java (Web Container) – specific versions are not listed in the provided sources.
Real-world impact
An attacker could read or alter sensitive files on the server and possibly cause denial‑of‑service by rendering parts of the local system unavailable.
Why this severity
The CVSS score reflects a network‑exploitable attack with high complexity but no privileges or user interaction required, leading to high impacts on confidentiality, integrity, and availability.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Jun 9, 2026 · Jun 9, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 23, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.