CVE-2026-102927 (GCVE-0-2026-102927)

Vulnerability from cvelistv5 – Published: 2026-11-05 17:29 – Updated: 2026-11-09 17:30
VLAI
Title
HedgeDoc: Missing validation of incoming permission values on change
Summary
HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.1, the WebSocket permission handler allows a note owner to store strings outside the supported freely, editable, limited, locked, protected, and private permission values. The viewing and editing checks handle only known values and can otherwise fall through to permissive behavior, making a note readable or writable more broadly than intended. SQLite deployments can persist the invalid value because the database column does not strictly enforce the set, while MySQL and PostgreSQL reject the database update but can leave the in-memory note state inconsistent for connected users until reload or cache eviction. Exploitation requires the note owner to intentionally submit an invalid permission value, and the owner could already choose a legitimate permissive setting, which limits the practical security impact. This issue is fixed in version 1.11.1.
Severity
5.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 17:28 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-284 - Improper Access Control
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
hedgedoc hedgedoc Affected: < 1.11.1
Create a notification for this product.
Show details on NVD website
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{
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      {
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              "content": {
                "id": "CVE-2026-102927",
                "options": [
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                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-09T17:28:34.545953Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-11-09T17:30:23.561Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "vendor": "hedgedoc",
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          "value": "HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.1, the WebSocket permission handler allows a note owner to store strings outside the supported freely, editable, limited, locked, protected, and private permission values. The viewing and editing checks handle only known values and can otherwise fall through to permissive behavior, making a note readable or writable more broadly than intended. SQLite deployments can persist the invalid value because the database column does not strictly enforce the set, while MySQL and PostgreSQL reject the database update but can leave the in-memory note state inconsistent for connected users until reload or cache eviction. Exploitation requires the note owner to intentionally submit an invalid permission value, and the owner could already choose a legitimate permissive setting, which limits the practical security impact. This issue is fixed in version 1.11.1."
        }
      ],
      "metrics": [
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            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
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        {
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              "description": "CWE-284: Improper Access Control",
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      "providerMetadata": {
        "dateUpdated": "2026-11-05T17:29:59.103Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
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          "tags": [
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        },
        {
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      "source": {
        "advisory": "GHSA-93w7-49m2-cqwg",
        "discovery": "UNKNOWN"
      },
      "title": "HedgeDoc: Missing validation of incoming permission values on change"
    }
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  "cveMetadata": {
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    "datePublished": "2026-11-05T17:29:59.103Z",
    "dateReserved": "2026-09-29T20:24:43.339Z",
    "dateUpdated": "2026-11-09T17:30:23.561Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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