Path Traversal in SAP NetWeaver Application Server Java Web Container
CVE-2026-40128 affects SAP NetWeaver Application Server Java in the Web Container component. The vulnerability allows an unauthenticated attacker to send a crafted HTTP logon request that manipulates file inclusion parameters, resulting in path traversal and subsequent processing of the included file. Based on the provided information, the flaw is reachable over the network without authentication or user interaction. Successful exploitation depends on supplying a malicious request that causes the application to include and process an unintended local file.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A directory traversal vulnerability in the Java Web Container that allows an anonymous attacker to manipulate file inclusion parameters via malicious HTTP logon requests, potentially accessing or modifying protected logs and causing host unavailability.
A path traversal and file inclusion vulnerability in SAP NetWeaver Application Server Java (Web Container) that allows an unauthenticated attacker to manipulate HTTP logon request file inclusion parameters, potentially leading to viewing or modifying sensitive information or causing denial of service.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.