Vulnerability-Lookup

CVE-2026-69086 (GCVE-0-2026-69086)

Vulnerability from cvelistv5 – Published: 2026-08-03 13:20 – Updated: 2026-08-14 16:51

Title

SiYuan before v3.7.3 Path Traversal via unvalidated avID

Summary

SiYuan versions before v3.7.3 fail to validate the avID parameter on all code branches in attribute-view read endpoints, allowing attackers to construct traversal paths that escape the storage directory. Authenticated users with RoleReader permissions or anonymous clients when publish authentication is disabled can read JSON files outside the attribute-view directory to disclose cross-scope database content.

Severity

8.3 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 14:46 UTC

CWE

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

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6774 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/siyuan-note/siyuan/security/ad…	vendor-advisory
https://www.vulncheck.com/advisories/siyuan-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
siyuan-note	siyuan	Affected: 0 , < 3.7.3 (semver) Unaffected: 3.7.3 (semver) cpe:2.3:a:b3log:siyuan::::::::

Date Public

2026-07-20 00:00

Credits

Shirshakhtml

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-69086

Vulnerability from fkie_nvd - Published: 2026-08-03 14:16 - Updated: 2026-10-23 21:10

Severity

7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7hm9-v7vf-7g4w
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/siyuan-before-path-traversal-via-unvalidated-avid

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-69086",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-03T14:46:41.709214Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-03T14:16:28.960",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7hm9-v7vf-7g4w"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/siyuan-before-path-traversal-via-unvalidated-avid"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-7HM9-V7VF-7G4W

Vulnerability from github – Published: 2026-09-03 20:34 – Updated: 2026-09-03 20:34

Summary

SiYuan: Path Traversal via unvalidated avID in RenderAttributeView/AV read endpoints : reader-reachable cross-scope attribute-view disclosure

Details

CVE: This vulnerability corresponds to CVE-2026-69086.

Summary

Four attribute-view read endpoints build a filesystem path from a caller-controlled id/avID and read it without confining the result to the attribute-view storage directory (DataDir/storage/av/). On the load (file-exists) code path there is no boundary check, so an avID containing ../ segments escapes storage/av/ and causes the kernel to read a .json file elsewhere in the workspace.

The endpoints require only CheckAuth, which the publish service's RoleReader token satisfies; when Publish.Auth.Enable is false the publish proxy uses the anonymous account, making the surface reachable with no credentials.

Details

Affected endpoints (all gated by CheckAuth only, no CheckAdminRole):

POST /api/av/renderAttributeView → arg["id"]
POST /api/av/getAttributeViewKeysByID → arg["avID"]
POST /api/av/getAttributeViewKeys → arg["id"]
POST /api/av/getCurrentAttrViewImages → arg["id"]

In model.RenderAttributeView (model/attribute_view_render.go), the only identifier guard ast.IsNodeIDPattern(avID) sits inside the if !filelock.IsExist(existPath) (create) branch:

existPath = GetAttributeViewDataPath(avID)      // path built from avID, no check
if !filelock.IsExist(existPath) {               // NOT-EXIST / CREATE branch
    if !createIfNotExist {
        return // NotFound
    }
    if !ast.IsNodeIDPattern(avID) {             // <-- ONLY id guard, create branch only
        return ErrInvalidID
    }
    // ... create ...
}
attrView, err = av.ParseAttributeView(avID)     // LOAD runs unconditionally

When the traversal avID resolves to a file that already exists, the !filelock.IsExist(...) condition is false, the entire block (including the line with ast.IsNodeIDPattern) is skipped, and control falls straight through to av.ParseAttributeView(avID). That function rebuilds the path via filepath.Join(DataDir, "storage", "av", avID+".json") and calls filelock.ReadFile with no filepath.Rel / IsSubPath / .. rejection:

// av.ParseAttributeView -> attributeViewDataPathByBox / GetAttributeViewDataPath
avJSONPath = filepath.Join(DataDir, "storage", "av", avID+".json")  // no boundary check
// -> parseAttributeViewByPathInBox(avJSONPath, boxID)
data, _ = filelock.ReadFile(avJSONPath)                             // SINK

filepath.Join cleans the path but does not reject .. segments, so it provides no containment. The three getAttributeView* endpoints call ParseAttributeView with no create branch at all, so they never even reach the ast.IsNodeIDPattern check same defect, same auth tier.

The root cause is that identifier validation is placed on a single code branch rather than confining the load to the AV base directory, so the load path reads a caller-controlled location.

PoC

Precondition: publish mode enabled (default port 6808); reachable by a RoleReader publish token, or anonymously when Publish.Auth.Enable is false.

A request to /api/av/renderAttributeView with an id composed of ../ path segments that resolves to an existing .json file outside DataDir/storage/av/ causes that file to be read and parsed instead of being rejected, because the identifier validation is only reached on the not-exist/create branch.

I have withheld the exact encoded id value from this draft to avoid publishing a live traversal against internet-exposed publish instances. I'm happy to provide the precise value and a screenshot privately in this thread on request.

Impact

An authenticated publish RoleReader or an anonymous client when publish auth is disabled can cause the kernel to read .json files outside the attribute-view directory. Because the loaded file is unmarshalled into the attribute-view structure, the reliable primitives are:

Disclosure of attribute-view (database) content from other scopes/notebooks the reader is not authorized to see.
A .json-path existence oracle for arbitrary workspace locations.

Files not conforming to the AV schema are read but reflect little content, and the .json suffix is force-appended, so this is not a general arbitrary-file read. No admin role, CSRF token, or write permission is required.

Suggested fix

Validate avID with ast.IsNodeIDPattern before path construction on all branches (move it ahead of FindAttributeViewPath / GetAttributeViewDataPath), or preferably, so every caller inherits it confine at the sink: in attributeViewDataPathByBox / GetAttributeViewDataPath, compute the joined path and reject it unless filepath.Rel(avBaseDir, cleaned) stays within avBaseDir (no leading ..). Sink-side confinement also covers the three getAttributeView* endpoints that never reach the create-branch guard.

Severity

7.7 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siyuan-note/siyuan/kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20260720151813-0f5a0e7c67b0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-69086"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-03T20:34:12Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "**CVE:** This vulnerability corresponds to [CVE-2026-69086](https://nvd.nist.gov/vuln/detail/CVE-2026-69086).\n\n### Summary\n\nFour attribute-view read endpoints build a filesystem path from a caller-controlled `id`/`avID` and read it without confining the result to the attribute-view storage directory (`DataDir/storage/av/`). On the load (file-exists) code path there is no boundary check, so an `avID` containing `../` segments escapes `storage/av/` and causes the kernel to read a `.json` file elsewhere in the workspace.\n\nThe endpoints require only `CheckAuth`, which the publish service\u0027s `RoleReader` token satisfies; when `Publish.Auth.Enable` is `false` the publish proxy uses the anonymous account, making the surface reachable with no credentials.\n\n### Details\n\nAffected endpoints (all gated by `CheckAuth` only, no `CheckAdminRole`):\n\n- `POST /api/av/renderAttributeView` \u0026nbsp;\u2192 `arg[\"id\"]`\n- `POST /api/av/getAttributeViewKeysByID` \u2192 `arg[\"avID\"]`\n- `POST /api/av/getAttributeViewKeys` \u0026nbsp;\u2192 `arg[\"id\"]`\n- `POST /api/av/getCurrentAttrViewImages` \u2192 `arg[\"id\"]`\n\nIn `model.RenderAttributeView` (`model/attribute_view_render.go`), the only identifier guard `ast.IsNodeIDPattern(avID)` sits **inside** the `if !filelock.IsExist(existPath)` (create) branch:\n\n```go\nexistPath = GetAttributeViewDataPath(avID)      // path built from avID, no check\nif !filelock.IsExist(existPath) {               // NOT-EXIST / CREATE branch\n    if !createIfNotExist {\n        return // NotFound\n    }\n    if !ast.IsNodeIDPattern(avID) {             // \u003c-- ONLY id guard, create branch only\n        return ErrInvalidID\n    }\n    // ... create ...\n}\nattrView, err = av.ParseAttributeView(avID)     // LOAD runs unconditionally\n```\n\nWhen the traversal `avID` resolves to a file that already exists, the `!filelock.IsExist(...)` condition is `false`, the entire block (including the line with `ast.IsNodeIDPattern`) is skipped, and control falls straight through to `av.ParseAttributeView(avID)`. That function rebuilds the path via `filepath.Join(DataDir, \"storage\", \"av\", avID+\".json\")` and calls `filelock.ReadFile` with no `filepath.Rel` / `IsSubPath` / `..` rejection:\n\n```go\n// av.ParseAttributeView -\u003e attributeViewDataPathByBox / GetAttributeViewDataPath\navJSONPath = filepath.Join(DataDir, \"storage\", \"av\", avID+\".json\")  // no boundary check\n// -\u003e parseAttributeViewByPathInBox(avJSONPath, boxID)\ndata, _ = filelock.ReadFile(avJSONPath)                             // SINK\n```\n\n`filepath.Join` cleans the path but does **not** reject `..` segments, so it provides no containment. The three `getAttributeView*` endpoints call `ParseAttributeView` with no create branch at all, so they never even reach the `ast.IsNodeIDPattern` check same defect, same auth tier.\n\nThe root cause is that identifier validation is placed on a single code branch rather than confining the load to the AV base directory, so the load path reads a caller-controlled location.\n\n### PoC\n\n**Precondition:** publish mode enabled (default port `6808`); reachable by a `RoleReader` publish token, or anonymously when `Publish.Auth.Enable` is `false`.\n\nA request to `/api/av/renderAttributeView` with an `id` composed of `../` path segments that resolves to an existing `.json` file outside `DataDir/storage/av/` causes that file to be read and parsed instead of being rejected, because the identifier validation is only reached on the not-exist/create branch.\n\nI have withheld the exact encoded `id` value from this draft to avoid publishing a live traversal against internet-exposed publish instances. I\u0027m happy to provide the precise value and a screenshot privately in this thread on request.\n\n### Impact\n\nAn authenticated publish `RoleReader` or an anonymous client when publish auth is disabled can cause the kernel to read `.json` files outside the attribute-view directory. Because the loaded file is unmarshalled into the attribute-view structure, the reliable primitives are:\n\n1. Disclosure of attribute-view (database) content from other scopes/notebooks the reader is not authorized to see.\n2. A `.json`-path existence oracle for arbitrary workspace locations.\n\nFiles not conforming to the AV schema are read but reflect little content, and the `.json` suffix is force-appended, so this is **not** a general arbitrary-file read. No admin role, CSRF token, or write permission is required.\n\n### Suggested fix\n\nValidate `avID` with `ast.IsNodeIDPattern` before path construction on **all** branches (move it ahead of `FindAttributeViewPath` / `GetAttributeViewDataPath`), or preferably, so every caller inherits it confine at the sink: in `attributeViewDataPathByBox` / `GetAttributeViewDataPath`, compute the joined path and reject it unless `filepath.Rel(avBaseDir, cleaned)` stays within `avBaseDir` (no leading `..`). Sink-side confinement also covers the three `getAttributeView*` endpoints that never reach the create-branch guard.",
  "id": "GHSA-7hm9-v7vf-7g4w",
  "modified": "2026-09-03T20:34:12Z",
  "published": "2026-09-03T20:34:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7hm9-v7vf-7g4w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69086"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siyuan-note/siyuan"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/siyuan-before-path-traversal-via-unvalidated-avid"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SiYuan: Path Traversal via unvalidated avID in RenderAttributeView/AV read endpoints : reader-reachable cross-scope attribute-view disclosure"
}

GHSA-X7JR-GVVR-P9W7

Vulnerability from github – Published: 2026-08-03 15:32 – Updated: 2026-09-03 20:33

Withdrawn 2026-09-03

Summary

Duplicate Advisory: Path Traversal via unvalidated avID in RenderAttributeView/AV read endpoints : reader-reachable cross-scope attribute-view disclosure

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-7hm9-v7vf-7g4w. This link is maintained to preserve external references.

Original Description

Severity

7.7 (High)


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

8.3 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 3.7.3"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siyuan-note/siyuan/kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-03T20:33:58Z",
    "nvd_published_at": "2026-08-03T14:16:28Z",
    "severity": "HIGH"
  },
  "details": "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00a0GHSA-7hm9-v7vf-7g4w. This link is maintained to preserve external references.\n\n## Original Description\nSiYuan versions before v3.7.3 fail to validate the avID parameter on all code branches in attribute-view read endpoints, allowing attackers to construct traversal paths that escape the storage directory. Authenticated users with RoleReader permissions or anonymous clients when publish authentication is disabled can read JSON files outside the attribute-view directory to disclose cross-scope database content.",
  "id": "GHSA-x7jr-gvvr-p9w7",
  "modified": "2026-09-03T20:33:58Z",
  "published": "2026-08-03T15:32:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7hm9-v7vf-7g4w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69086"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/siyuan-before-path-traversal-via-unvalidated-avid"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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"
    }
  ],
  "summary": "Duplicate Advisory: Path Traversal via unvalidated avID in RenderAttributeView/AV read endpoints : reader-reachable cross-scope attribute-view disclosure",
  "withdrawn": "2026-09-03T20:33:58Z"
}

Sightings

Author	Source	Type	Date	Other

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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.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-69086 (GCVE-0-2026-69086)

FKIE_CVE-2026-69086

GHSA-7HM9-V7VF-7G4W

Summary

Details

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GHSA-X7JR-GVVR-P9W7

Duplicate Advisory

Original Description

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