What’s Vulnerable › Vulnerabilities

CVE-2026-44257: efw4.X: RCE via zipslip

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-12 · updated 2026-10-26
• Weakness: CWE-77

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.

Affected products

• efwGrp efw4.X: before 4.08.010

References

• https://github.com/efwGrp/efw4.X/security/advisories/GHSA-q7jx-7x5r-r9f6
• https://github.com/efwGrp/efw4.X/security/advisories/GHSA-q7jx-7x5r-r9f6

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