FKIE_CVE-2026-34448

Vulnerability from fkie_nvd - Published: 2026-03-31 22:16 - Updated: 2026-04-03 16:58
Severity ?
9.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Summary
SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with “Cover From -> Asset Field” enabled. The vulnerable code accepts arbitrary http(s) URLs without extensions as images, stores the attacker-controlled string in coverURL, and injects it directly into an <img src="..."> attribute without escaping. In the Electron desktop client, the injected JavaScript executes with nodeIntegration enabled and contextIsolation disabled, so the XSS reaches arbitrary OS command execution under the victim’s account. This issue has been patched in version 3.6.2.
References
security-advisories@github.comhttps://github.com/siyuan-note/siyuan/issues/17246Issue Tracking
security-advisories@github.comhttps://github.com/siyuan-note/siyuan/releases/tag/v3.6.2Release Notes
security-advisories@github.comhttps://github.com/siyuan-note/siyuan/security/advisories/GHSA-rx4h-526q-4458Exploit, Vendor Advisory
Impacted products
Vendor Product Version
b3log siyuan *
To clipboard 

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              "matchCriteriaId": "27CB71A7-7208-417A-AE6D-266D57F683E9",
              "versionEndExcluding": "3.6.2",
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with \u201cCover From -\u003e Asset Field\u201d enabled. The vulnerable code accepts arbitrary http(s) URLs without extensions as images, stores the attacker-controlled string in coverURL, and injects it directly into an \u003cimg src=\"...\"\u003e attribute without escaping. In the Electron desktop client, the injected JavaScript executes with nodeIntegration enabled and contextIsolation disabled, so the XSS reaches arbitrary OS command execution under the victim\u2019s account. This issue has been patched in version 3.6.2."
    }
  ],
  "id": "CVE-2026-34448",
  "lastModified": "2026-04-03T16:58:40.760",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-31T22:16:19.657",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/siyuan-note/siyuan/issues/17246"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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        "Vendor Advisory"
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      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rx4h-526q-4458"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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