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ETK-2026-1228Zero's internal tracking ID, independent of the CVE number.

ETK-2026-1228Zero's internal tracking ID, independent of the CVE number.

waiting for further signalsZero needs more public information before it can validate it.

GHSA-q768-4j87-gf3w ↗

no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−12dkevAttacks confirmed in the real world.
go:siyuan-note <= 3.8.6
fixed in v3.8.7
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-1228Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:golang/siyuan-note
cvss7.0ethiack provisional
9d 20h 31msince last run
38mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org, not yet published
trigger signal −12dpublic poc−12dwaiting for further signals−9.9d
−5d
0

description

SiYuan versions before 3.8.7 can let an authenticated MCP caller cause local files outside the workspace to be imported as workspace assets when path filtering misses them. An attacker able to invoke the MCP asset-upload tool with an authorized token can retrieve the imported file through the application's asset access path.

mitigation

Upgrade SiYuan to v3.8.7. Until upgraded, restrict MCP access and prevent the service account from reading sensitive files outside the workspace.

fixed in v3.8.7

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
–
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
38m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−12d
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-09 12:35Z
  2. 2026-10-09 12:35Z

this entry in the feed

GET /api/v1/feed/ETK-2026-1228

{
  "etk_id": "ETK-2026-1228",
  "cve_id": null,
  "display_id": "ETK-2026-1228",
  "ghsa_id": "GHSA-q768-4j87-gf3w",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "MCP asset upload path traversal in SiYuan",
  "summary": "SiYuan versions before 3.8.7 can let an authenticated MCP caller cause local files outside the workspace to be imported as workspace assets when path filtering misses them. An attacker able to invoke the MCP asset-upload tool with an authorized token can retrieve the imported file through the application's asset access path.",
  "mitigation": "Upgrade SiYuan to v3.8.7. Until upgraded, restrict MCP access and prevent the service account from reading sensitive files outside the workspace.",
  "vendor": "go",
  "product": "go:siyuan-note",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 3.8.6"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v3.8.7"
      ],
      "package_name": "siyuan-note",
      "purl": "pkg:golang/siyuan-note"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7,
  "cvss_src": "ethiack_provisional",
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 37.52455095,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-09T12:35:45+00:00",
      "days": -11.716621021782407,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T05:47:41.083291+00:00",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w"
    },
    "trigger_signal": {
      "at": "2026-10-09T12:35:45+00:00",
      "days": -11.716621021782407,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T05:47:41.083291+00:00",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w"
    }
  }
}

published 2026-10-11 08:39Z
last change 2026-10-21 05:31Z

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