Vulnerability-Lookup

CVE-2026-57573 (GCVE-0-2026-57573)

Vulnerability from cvelistv5 – Published: 2026-07-06 20:11 – Updated: 2026-07-07 14:16

Title

Crawl4AI unauthenticated SSRF in Docker streaming crawl endpoint

Summary

Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, the Docker API server applied its SSRF destination check on the non-streaming /crawl path but not on the streaming path. handle_stream_crawl_request passed seed URLs straight to the crawler with no destination validation, allowing a remote unauthenticated client to call POST /crawl/stream or POST /crawl with crawler_config.stream=true with a URL pointing at an internal, private, or link-local address; the server fetched it and streamed the response body back. This issue is fixed in version 0.9.0.

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-07 14:16 UTC

CWE

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

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/unclecode/crawl4ai/security/ad…	x_refsource_CONFIRM
https://github.com/unclecode/crawl4ai/commit/6088…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
unclecode	crawl4ai	Affected: < 0.9.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-57573

Vulnerability from fkie_nvd - Published: 2026-07-06 21:16 - Updated: 2026-07-07 19:07

Severity

8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2	Patch
	security-advisories@github.com	https://github.com/unclecode/crawl4ai/security/advisories/GHSA-wm69-2pc3-rmmf	Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	kidocode	crawl4ai	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "crawl4ai",
          "vendor": "unclecode",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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              "versionEndExcluding": "0.9.0",
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            }
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          "operator": "OR"
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    {
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GHSA-WM69-2PC3-RMMF

Vulnerability from github – Published: 2026-06-18 17:25 – Updated: 2026-06-18 17:25

Summary

Crawl4AI: Unauthenticated SSRF on the Docker server streaming crawl path (/crawl/stream)

Details

Summary

The Docker API server applied its SSRF destination check (validate_url_destination) on the non-streaming /crawl path but not on the streaming path. handle_stream_crawl_request passed seed URLs straight to the crawler with no destination validation. A remote, unauthenticated client could call POST /crawl/stream (or POST /crawl with crawler_config.stream=true, which short-circuits to the same handler) with a URL pointing at an internal, private, or link-local address; the server fetched it and streamed the response body back. The Docker API is unauthenticated by default.

Affected paths

POST /crawl/stream, and POST /crawl with crawler_config.stream=true (both route to handle_stream_crawl_request, deploy/docker/api.py).

Impact

Unauthenticated read server-side request forgery: an attacker reads internal-only services and cloud-metadata endpoints (e.g. http://169.254.169.254/ for IAM credentials), with the response body streamed back. This is the same class and severity as the project's prior "SSRF via Direct Crawl Endpoints" advisory; /crawl/stream is part of that endpoint family and was never covered by the destination check.

Fix

handle_stream_crawl_request now validates every seed URL's destination with the same global-routability check as handle_crawl_request, before any fetch. The SSRF regression test was hardened to assert per-handler coverage (including the streaming handler) rather than a bare occurrence count, which previously let this gap pass.

Workarounds

Upgrade to the patched version (0.9.0).
Enable authentication and restrict who can reach the API (note: this does not constrain which URL the API fetches).
Restrict the container's outbound network access (egress firewall / no metadata route).

Credits

KOH Jun Sheng - reported the streaming-path SSRF with a runnable PoC and noted the count-based regression test that masked it, plus the shared root cause with redirect/deep-crawl link following.

Severity

8.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.8.9"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "crawl4ai"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-18T17:25:50Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nThe Docker API server applied its SSRF destination check (`validate_url_destination`) on the non-streaming `/crawl` path but not on the streaming path. `handle_stream_crawl_request` passed seed URLs straight to the crawler with no destination validation. A remote, unauthenticated client could call `POST /crawl/stream` (or `POST /crawl` with `crawler_config.stream=true`, which short-circuits to the same handler) with a URL pointing at an internal, private, or link-local address; the server fetched it and streamed the response body back. The Docker API is unauthenticated by default.\n\n### Affected paths\n\n`POST /crawl/stream`, and `POST /crawl` with `crawler_config.stream=true` (both route to `handle_stream_crawl_request`, `deploy/docker/api.py`).\n\n### Impact\n\nUnauthenticated read server-side request forgery: an attacker reads internal-only services and cloud-metadata endpoints (e.g. `http://169.254.169.254/` for IAM credentials), with the response body streamed back. This is the same class and severity as the project\u0027s prior \"SSRF via Direct Crawl Endpoints\" advisory; `/crawl/stream` is part of that endpoint family and was never covered by the destination check.\n\n### Fix\n\n`handle_stream_crawl_request` now validates every seed URL\u0027s destination with the same global-routability check as `handle_crawl_request`, before any fetch. The SSRF regression test was hardened to assert per-handler coverage (including the streaming handler) rather than a bare occurrence count, which previously let this gap pass.\n\n### Workarounds\n\n- Upgrade to the patched version (0.9.0).\n- Enable authentication and restrict who can reach the API (note: this does not constrain which URL the API fetches).\n- Restrict the container\u0027s outbound network access (egress firewall / no metadata route).\n\n### Credits\n\nKOH Jun Sheng - reported the streaming-path SSRF with a runnable PoC and noted the count-based regression test that masked it, plus the shared root cause with redirect/deep-crawl link following.",
  "id": "GHSA-wm69-2pc3-rmmf",
  "modified": "2026-06-18T17:25:50Z",
  "published": "2026-06-18T17:25:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-wm69-2pc3-rmmf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/unclecode/crawl4ai"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Crawl4AI: Unauthenticated SSRF on the Docker server streaming crawl path (/crawl/stream)"
}

PYSEC-2026-2140

Vulnerability from pysec - Published: 2026-07-06 21:16 - Updated: 2026-07-13 05:48

Details

Severity

8.6 (High)


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

Impacted products

Name	purl
crawl4ai	pkg:pypi/crawl4ai

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "crawl4ai",
        "purl": "pkg:pypi/crawl4ai"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.0",
        "0.3.1",
        "0.3.2",
        "0.3.3",
        "0.3.4",
        "0.3.5",
        "0.3.6",
        "0.3.7",
        "0.3.71",
        "0.3.72",
        "0.3.73",
        "0.3.731",
        "0.3.74",
        "0.3.741",
        "0.3.742",
        "0.3.743",
        "0.3.744",
        "0.3.745",
        "0.3.746",
        "0.3.8",
        "0.4.0",
        "0.4.1",
        "0.4.21",
        "0.4.22",
        "0.4.23",
        "0.4.24",
        "0.4.241",
        "0.4.242",
        "0.4.243",
        "0.4.244",
        "0.4.245",
        "0.4.246",
        "0.4.247",
        "0.4.248",
        "0.4.248b3",
        "0.4.3b1",
        "0.4.3b2",
        "0.4.3b3",
        "0.5.0",
        "0.5.0.post1",
        "0.5.0.post2",
        "0.5.0.post3",
        "0.5.0.post4",
        "0.5.0.post5",
        "0.5.0.post6",
        "0.5.0.post7",
        "0.5.0.post8",
        "0.6.0",
        "0.6.0rc1",
        "0.6.1",
        "0.6.2",
        "0.6.3",
        "0.7.0",
        "0.7.1",
        "0.7.2",
        "0.7.3",
        "0.7.4",
        "0.7.5",
        "0.7.6",
        "0.7.7",
        "0.7.8",
        "0.8.0",
        "0.8.5",
        "0.8.6",
        "0.8.7",
        "0.8.8",
        "0.8.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-57573",
    "GHSA-wm69-2pc3-rmmf"
  ],
  "details": "Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, the Docker API server applied its SSRF destination check on the non-streaming /crawl path but not on the streaming path. handle_stream_crawl_request passed seed URLs straight to the crawler with no destination validation, allowing a remote unauthenticated client to call POST /crawl/stream or POST /crawl with crawler_config.stream=true with a URL pointing at an internal, private, or link-local address; the server fetched it and streamed the response body back. This issue is fixed in version 0.9.0.",
  "id": "PYSEC-2026-2140",
  "modified": "2026-07-13T05:48:23.723846Z",
  "published": "2026-07-06T21:16:58.197Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-wm69-2pc3-rmmf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-57573 (GCVE-0-2026-57573)

FKIE_CVE-2026-57573

GHSA-WM69-2PC3-RMMF

Summary

Affected paths

Impact

Fix

Workarounds

Credits

PYSEC-2026-2140

Tags

Sightings

Nomenclature

Related by attack behaviour