CVE-2026-56768 (GCVE-0-2026-56768)

Vulnerability from cvelistv5 – Published: 2026-06-25 18:05 – Updated: 2026-06-25 18:05 X_Open Source
VLAI
Title
Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method
Summary
Seahub before 13.0.23 does not enforce SHARE_LINK_LOGIN_REQUIRED on GET /api/v2.1/share-link-zip-task/, allowing unauthenticated users to bypass authentication. Attackers with a folder share-link token can call the GET endpoint to obtain a fileserver zip token and download entire shared directory trees.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
haiwen seahub Affected: 0 , < 13.0.23 (semver)
Create a notification for this product.
Date Public
2026-05-29 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "seahub",
          "repo": "https://github.com/haiwen/seahub",
          "vendor": "haiwen",
          "versions": [
            {
              "lessThan": "13.0.23",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-05-29T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Seahub before 13.0.23 does not enforce SHARE_LINK_LOGIN_REQUIRED on GET /api/v2.1/share-link-zip-task/, allowing unauthenticated users to bypass authentication. Attackers with a folder share-link token can call the GET endpoint to obtain a fileserver zip token and download entire shared directory trees."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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              "value": "GENERAL"
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T18:05:06.817Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://plus.seafile.com/wiki/publish/seafile-wiki/v5D5/"
        },
        {
          "name": "GitHub Issue",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/haiwen/seahub/issues/9050"
        },
        {
          "name": "Patch Commit (1)",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/haiwen/seahub/commit/b609949cf64ed6a15708d0fb5ea9c179962e23cc"
        },
        {
          "name": "Patch Commit (2)",
          "tags": [
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          ],
          "url": "https://github.com/haiwen/seahub/commit/162cddae0831188d02bb8d451dc2193e197dcc57"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/seahub-authentication-bypass-in-sharelinkziptaskview-get-method"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "title": "Seahub \u003c 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-56768",
    "datePublished": "2026-06-25T18:05:06.817Z",
    "dateReserved": "2026-06-22T21:55:17.942Z",
    "dateUpdated": "2026-06-25T18:05:06.817Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-56768",
      "date": "2026-06-26",
      "epss": "0.00381",
      "percentile": "0.29922"
    }
  }
}


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