FKIE_CVE-2026-70488

Vulnerability from fkie_nvd - Published: 2026-08-04 21:16 - Updated: 2026-08-05 15:17
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Summary
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objects belonged to that knowledge base. A user with write access to one knowledge base could delete directories and remove file embeddings from another knowledge base, causing documents to drop out of retrieval results and breaking chat-with-file for targeted documents without disclosing contents. This issue is fixed in 0.11.0.
References
security-advisories@github.comhttps://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539
security-advisories@github.comhttps://github.com/open-webui/open-webui/pull/26722
security-advisories@github.comhttps://github.com/open-webui/open-webui/releases/tag/v0.11.0
security-advisories@github.comhttps://github.com/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.9.6, \u003c 0.11.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objects belonged to that knowledge base. A user with write access to one knowledge base could delete directories and remove file embeddings from another knowledge base, causing documents to drop out of retrieval results and breaking chat-with-file for targeted documents without disclosing contents. This issue is fixed in 0.11.0."
    }
  ],
  "id": "CVE-2026-70488",
  "lastModified": "2026-08-05T15:17:10.953",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-70488",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-05T14:02:23.164734Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-04T21:16:37.623",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/open-webui/open-webui/pull/26722"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-jxc9-xmc4-gr23"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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