CVE-2026-40128 Directory Traversal vulnerability in SAP NetWeaver Application Server Java (Web Container)
Unauthenticated attackers can exploit path traversal in SAP NetWeaver Java Web Container to view or modify sensitive data and cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40128?
CVE-2026-40128 is a critical path traversal vulnerability in SAP_SE SAP NetWeaver Application Server Java (Web Container), published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SAP NetWeaver Application Server Java (Web Container) allows an unauthenticated attacker to craft a malicious HTTP logon request that manipulates file inclusion parameters, enabling path traversal and processing of the included file. Processing the included file could allow the attacker to view or modify sensitive information or render any part of the local system unavailable.
Weakness: CWE-35
Which versions are affected by CVE-2026-40128?
How do I fix CVE-2026-40128?
No fix has been published for CVE-2026-40128 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-40128 being exploited?
There is no known exploitation of CVE-2026-40128 in the wild and no public exploit code.
Sources
Also known as GHSA-xgpc-r53m-pqc6.