SiYuan: Missing consistency check between packageName and repoURL/repoHash in bazaar package install allows overwriting an existing, trusted plugin

{
  "id": "350ad97f9decd3bdf90711096ee1249809d7f515f3f167d936f6274c8ac14b82",
  "url": "https://osv.dev/vulnerability/GHSA-rpx2-p6hp-x5gj",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SiYuan: Missing consistency check between packageName and repoURL/repoHash in bazaar package install allows overwriting an existing, trusted plugin",
    "summary": "## Summary `installBazaarPlugin` (and the equivalent endpoints for widgets/icons/templates/themes) accept `packageName`, `repoURL`, and `repoHash` as independent request fields with no validation that they refer to the same package. `packageName` alone determines the install destination; `repoURL`/`repoHash` alone determine what content gets downloaded and written there. A request can name an already-installed, already-enabled plugin as `packageName` while pointing `repoURL`/ `repoHash` at different, attacker-influenced content, silently overwriting the existing plugin's files. ## Affected code `kernel/api/bazaar.go`: ```go util.BindJsonArg(\"packageName\", &packageName, true, true) util.BindJsonArg(\"repoURL\", &repoURL, true, true) util.BindJsonArg(\"repoHash\", &repoHash, true, true) err := model.InstallBazaarPackage(\"plugins\", repoURL, repoHash, packageName, 0) ``` `kernel/model/bazaar.go`: ```go func getPackageInstallPath(pkgType, packageName string) (string, string, error) { case \"plugins\": return filepath.Join(util.DataDir, \"plugins\", packageName), \"plugin.json\", nil ``` `kernel/bazaar/install.go`: ```go func installPackage(data []byte, installPath string) (err error) { ... if err = filelock.Copy(srcPath, installPath); err != nil { return } return } ``` `installPath` is derived solely from `packageName`; the downloaded `data` is derived solely from `repoURL`/`repoHash`; nothing cross-validates them, and `installPackage` performs no check for whether `installPath` already con",
    "evidence": "osv:GHSA-rpx2-p6hp-x5gj",
    "products": [
      {
        "name": {
          "value": "github.com/siyuan-note/siyuan/kernel",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.0.0-20260808010544-26ccb40d390e",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-rpx2-p6hp-x5gj",
      "aliases": [
        "CVE-2026-62204",
        "GHSA-rpx2-p6hp-x5gj"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.0.0-20260808010544-26ccb40d390e"
                }
              ]
            }
          ],
          "package": {
            "name": "github.com/siyuan-note/siyuan/kernel",
            "purl": "pkg:golang/github.com/siyuan-note/siyuan/kernel",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-rpx2-p6hp-x5gj/GHSA-rpx2-p6hp-x5gj.json"
          }
        }
      ],
      "modified": "2026-10-23T18:45:08.585065959Z",
      "provider": "osv",
      "references": [
        "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-62204",
        "https://github.com/siyuan-note/siyuan/commit/26ccb40d390eb7d9b04673629a58ab1d69cc7e53",
        "https://github.com/siyuan-note/siyuan",
        "https://github.com/siyuan-note/siyuan/releases/tag/v3.8.0",
        "https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-345",
          "CWE-668"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-10-23T18:38:25Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-62204",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 424606,
  "published_at": "2026-10-23T18:38:25+00:00"
}