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CVE-2026-40128 is a critical directory traversal vulnerability in the Web Container of SAP NetWeaver Application Server Java. The flaw allows a remote, unauthenticated attacker to send a crafted HTTP logon request that manipulates file inclusion parameters, causing path traversal outside the intended application context and triggering processing of the referenced file. Public reporting indicates the vulnerable component is the Web Container logon handling path and that exploitation occurs through malicious inclusion input in the HTTP logon request. Successful exploitation can expose files outside the intended directory scope and, because the target file is processed rather than merely referenced, can enable unauthorized reading or modification of sensitive information and disruption of local system availability. Reported affected versions include ENGINEAPI 7.50.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical vulnerability in SAP NetWeaver AS Java Web Container allowing access to files outside the intended application context.
A critical directory traversal vulnerability in SAP NetWeaver Application Server Java Web Container that may allow access to or modification of files outside the intended directory path.
A critical directory traversal vulnerability in SAP NetWeaver Application Server Java Web Container that may allow access to or modification of files outside the intended directory path.
A directory traversal vulnerability in SAP NetWeaver Application Server Java Web Container.
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.