Vulnerability-Lookup

CVE-2026-56122 (GCVE-0-2026-56122)

Vulnerability from cvelistv5 – Published: 2026-06-25 13:34 – Updated: 2026-06-25 14:07 X_Open Source Unsupported When Assigned

Title

Winstone Servlet Engine 0.9.10 Path Traversal via HTTP Request Paths

Summary

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.

Severity

8.7 (High)


                        
                          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

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

VulnCheck

References

3 references

URL	Tags
https://gist.github.com/VAMorales/ce93f10215c43b2…	technical-descriptionexploit
https://winstone.sourceforge.net/	product
https://www.vulncheck.com/advisories/winstone-ser…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
rickknowles	Winstone Servlet Container	Affected: 0 , ≤ 0.9.10 (semver)

Date Public

2026-06-24 00:00

Credits

Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp.

Show details on NVD website

JSON

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GHSA-QF2J-8858-JVCV

Vulnerability from github – Published: 2026-06-25 15:32 – Updated: 2026-06-25 15:32

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

8.7 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-56122"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T14:16:51Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-qf2j-8858-jvcv",
  "modified": "2026-06-25T15:32:02Z",
  "published": "2026-06-25T15:32:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56122"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/VAMorales/ce93f10215c43b2a8344426f4dd59cd3"
    },
    {
      "type": "WEB",
      "url": "https://winstone.sourceforge.net"
    },
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      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/winstone-servlet-engine-path-traversal-via-http-request-paths"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-56122 (GCVE-0-2026-56122)

GHSA-QF2J-8858-JVCV

Tags

Sightings

Nomenclature