Vulnerability-Lookup

CVE-2026-70479 (GCVE-0-2026-70479)

Vulnerability from cvelistv5 – Published: 2026-08-04 19:40 – Updated: 2026-08-04 19:40

Title

Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Summary

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0.

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/open-webui/open-webui/security…	x_refsource_CONFIRM
https://github.com/open-webui/open-webui/pull/27526	x_refsource_MISC
https://github.com/open-webui/open-webui/commit/b…	x_refsource_MISC
https://github.com/open-webui/open-webui/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
open-webui	open-webui	Affected: >= 0.9.6, < 0.11.0

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.9.6, \u003c 0.11.0"
            }
          ]
        }
      ],
      "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, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T19:40:12.035Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95"
        },
        {
          "name": "https://github.com/open-webui/open-webui/pull/27526",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/pull/27526"
        },
        {
          "name": "https://github.com/open-webui/open-webui/commit/bef63a2ae915571d50d2722a635e8bfa753d7877",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/commit/bef63a2ae915571d50d2722a635e8bfa753d7877"
        },
        {
          "name": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0"
        }
      ],
      "source": {
        "advisory": "GHSA-w2rx-84hp-gg95",
        "discovery": "UNKNOWN"
      },
      "title": "Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-70479",
    "datePublished": "2026-08-04T19:40:12.035Z",
    "dateReserved": "2026-08-04T15:24:41.339Z",
    "dateUpdated": "2026-08-04T19:40:12.035Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-70479\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-04T20:16:54.760\",\"lastModified\":\"2026-08-04T20:16:54.760\",\"vulnStatus\":\"Received\",\"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, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"open-webui\",\"product\":\"open-webui\",\"versions\":[{\"version\":\"\u003e= 0.9.6, \u003c 0.11.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"references\":[{\"url\":\"https://github.com/open-webui/open-webui/commit/bef63a2ae915571d50d2722a635e8bfa753d7877\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/open-webui/open-webui/pull/27526\",\"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-w2rx-84hp-gg95\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}

GHSA-W2RX-84HP-GG95

Vulnerability from github – Published: 2026-08-04 19:40 – Updated: 2026-08-04 19:40

Summary

Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Details

Summary

With the Playwright web loader enabled, Open WebUI opens user-submitted URLs in a real browser and validates the destination address before allowing the request. That check only ran for the top-level page request. Every other request the page issued was passed through unvalidated, so a page could use its own JavaScript to reach addresses the validation exists to block. Because the loader returns the page's final DOM to the requesting user, anything the page read back from those addresses ends up in the web-search or RAG output.

Preconditions

WEB_LOADER_ENGINE=playwright. This is not the default; deployments on the default web loader are unaffected.
A reachable Playwright browser, either local or via PLAYWRIGHT_WS_URL.
Any authenticated user who can submit a URL for ingestion or trigger a web search. No administrator role is required.
Something worth reading on a network the browser can reach. A deployment whose browser container has no route to internal services loses nothing here.

Impact

An authenticated user can read HTTP responses from services reachable by the browser process: cloud instance metadata, other containers on the same network, and internal APIs bound to private addresses. The content is returned to the user through the normal web-search or document-ingestion result, so this is a read primitive, not a blind one. It confers no write access and no availability impact, and it does not extend beyond what the browser's network position already allows.

Fix

Fixed in 0.11.0 by commit bef63a2ae. Every intercepted request is now validated, fetched with redirects disabled, re-validated on each redirect hop and then fulfilled, so neither a sub-resource nor a redirect can land on a non-global address. The same change blocks the two paths that never reached the interceptor at all: service-worker requests, via service_workers="block", and WebSocket connections, via a route handler that never connects upstream. Upgrading to 0.11.0 fully resolves the issue; no configuration change is required.

Root cause

Affected component: SafePlaywrightURLLoader in backend/open_webui/retrieval/web/utils.py, in both the sync and async request interceptors. Affected setup: only builds running the Playwright loader engine.

The interceptor was written to guard navigation, and its first action was to return early for any request whose resource type was not document. The intent was that only the page the user asked for needs address validation, but a browser page is not a single request: once the validated document loads, its scripts issue further requests under the page's own control, and those never reached the validation. The address check was therefore applied to the one request the attacker did not need to control, and skipped on every request they did.

Proof of concept

Reported against 0.10.2 by driving the interceptor directly with stand-in route and request objects, one call per resource type, against http://169.254.169.254/latest/meta-data/. The document type is aborted; every other type is continued unvalidated. The browser and the network request were seeded rather than driven end to end; the code path exercised is the one the browser reaches for each sub-resource.

Credits

@edwardav970 — identified that address validation was applied only to the top-level document request, leaving every sub-resource type unvalidated.

Severity

7.7 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.9.6"
            },
            {
              "fixed": "0.11.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-70479"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-04T19:40:48Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\nWith the Playwright web loader enabled, Open WebUI opens user-submitted URLs in a real browser and validates the destination address before allowing the request. That check only ran for the top-level page request. Every other request the page issued was passed through unvalidated, so a page could use its own JavaScript to reach addresses the validation exists to block. Because the loader returns the page\u0027s final DOM to the requesting user, anything the page read back from those addresses ends up in the web-search or RAG output.\n\n## Preconditions\n- `WEB_LOADER_ENGINE=playwright`. This is not the default; deployments on the default web loader are unaffected.\n- A reachable Playwright browser, either local or via `PLAYWRIGHT_WS_URL`.\n- Any authenticated user who can submit a URL for ingestion or trigger a web search. No administrator role is required.\n- Something worth reading on a network the browser can reach. A deployment whose browser container has no route to internal services loses nothing here.\n\n## Impact\nAn authenticated user can read HTTP responses from services reachable by the browser process: cloud instance metadata, other containers on the same network, and internal APIs bound to private addresses. The content is returned to the user through the normal web-search or document-ingestion result, so this is a read primitive, not a blind one. It confers no write access and no availability impact, and it does not extend beyond what the browser\u0027s network position already allows.\n\n## Fix\nFixed in 0.11.0 by commit `bef63a2ae`. Every intercepted request is now validated, fetched with redirects disabled, re-validated on each redirect hop and then fulfilled, so neither a sub-resource nor a redirect can land on a non-global address. The same change blocks the two paths that never reached the interceptor at all: service-worker requests, via `service_workers=\"block\"`, and WebSocket connections, via a route handler that never connects upstream. Upgrading to 0.11.0 fully resolves the issue; no configuration change is required.\n\n## Root cause\nAffected component: `SafePlaywrightURLLoader` in `backend/open_webui/retrieval/web/utils.py`, in both the sync and async request interceptors. Affected setup: only builds running the Playwright loader engine.\n\nThe interceptor was written to guard navigation, and its first action was to return early for any request whose resource type was not `document`. The intent was that only the page the user asked for needs address validation, but a browser page is not a single request: once the validated document loads, its scripts issue further requests under the page\u0027s own control, and those never reached the validation. The address check was therefore applied to the one request the attacker did not need to control, and skipped on every request they did.\n\n## Proof of concept\nReported against 0.10.2 by driving the interceptor directly with stand-in route and request objects, one call per resource type, against `http://169.254.169.254/latest/meta-data/`. The `document` type is aborted; every other type is continued unvalidated. The browser and the network request were seeded rather than driven end to end; the code path exercised is the one the browser reaches for each sub-resource.\n\n## Credits\n- **@edwardav970** \u2014 identified that address validation was applied only to the top-level document request, leaving every sub-resource type unvalidated.",
  "id": "GHSA-w2rx-84hp-gg95",
  "modified": "2026-08-04T19:40:48Z",
  "published": "2026-08-04T19:40:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/pull/27526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/bef63a2ae915571d50d2722a635e8bfa753d7877"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-70479 (GCVE-0-2026-70479)

GHSA-W2RX-84HP-GG95

Summary

Preconditions

Impact

Fix

Root cause

Proof of concept

Credits

Tags

Sightings

Nomenclature