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CVE-2026-56122

Winstone Servlet Engine 0.9.10 Path Traversal via HTTP Request Paths

CVSS 8.7 HIGHEPSS 0.4%CWE-22
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 8.7EPSS 0.4%KEV nãoPoC públicaNuclei Metasploit Patch
Lifecycle
25 Jun 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
Winstone Servlet Engine through 0.9.10 contains a path traversal vulnerability that allows unauthenticated attackers to read arbitrary files by sending HTTP GET requests with dot-dot-slash sequences that are not sanitized when serving static files from the configured webroot. Attackers can traverse outside the webroot directory using traversal-prefixed paths in a single HTTP request to read any file accessible to the servlet engine process, including sensitive system files when the service runs with elevated privileges.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.