CVE-2026-44257 efw4.X: RCE via zipslip
Remote attackers can upload malicious ZIP files to execute arbitrary code via path traversal in the file manager.
- 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-2026-44257?
CVE-2026-44257 is a critical path traversal vulnerability in efwGrp efw4.X, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, efw.file.FileManager.unZip writes zip entries to disk using new File(baseDir, zipEntry.getName()) with no canonical-path check. An entry name such as ../../../pwned.jsp escapes the intended extraction directory and lands anywhere the Tomcat process can write — including the servlet context root. Combined with the framework's multipart /uploadServlet and an event that calls file.saveUploadFiles + FileManager.unZip, a remote attacker with no credentials drops a JSP webshell and executes arbitrary commands as the Tomcat user. This vulnerability is fixed in 4.08.010.
Weakness: CWE-77
Which versions are affected by CVE-2026-44257?
How do I fix CVE-2026-44257?
No fix has been published for CVE-2026-44257 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-2026-44257 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44257 exists.
Sources
Also known as GHSA-q7jx-7x5r-r9f6.