Vulnerability-Lookup

BREW-SCRAPY-GHSA-CWXJ-RR… (GHSA-CWXJ-RR6W-M6W7)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:34 – Updated: 2026-10-08 16:23 – Source website

Summary

Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware

Details

Scrapy is a high-level web crawling and scraping framework for Python. From 1.4.0 until 2.14.2, RefererMiddleware in scrapy/spidermiddlewares/referer.py treated a Referrer-Policy response-header value that resembled a Python import path as a referrer policy class, imported the referenced object, and called it. A malicious website could supply a callable such as sys.exit and terminate a crawler processing the response. This issue is fixed in version 2.14.2.

Severity

7.5 (High)


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

References

URL

Type

	https://github.com/scrapy/scrapy/releases/tag/2.14.2	WEB
	https://github.com/CVEProject/cvelistV5/tree/main…	ADVISORY
	https://github.com/scrapy/scrapy/security/advisor…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-105782	ADVISORY
	https://github.com/scrapy/scrapy/commit/945b787a2…	FIX
	https://github.com/scrapy/scrapy/commit/b6e5c58ae…	FIX

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "2.14.2"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "scrapy",
        "purl": "pkg:brew/scrapy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.9.0"
            },
            {
              "fixed": "2.14.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/scrapy/scrapy",
        "name": "https://github.com/scrapy/scrapy",
        "strategy": "git",
        "subject_version": "2.19.0"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/scrapy@2.19.0",
        "name": "scrapy",
        "strategy": "registry",
        "subject_version": "2.19.0"
      },
      {
        "ecosystem": "Debian",
        "key": "Debian/python-scrapy",
        "name": "python-scrapy",
        "strategy": "distro"
      },
      {
        "ecosystem": "GIT",
        "key": "upstream:https://github.com/scrapy/scrapy",
        "name": "https://github.com/scrapy/scrapy",
        "strategy": "distro",
        "subject_version": "2.19.0"
      },
      {
        "ecosystem": "PyPI",
        "key": "upstream:pkg:pypi/scrapy@2.19.0",
        "name": "scrapy",
        "strategy": "distro",
        "subject_version": "2.19.0"
      },
      {
        "ecosystem": "Ubuntu",
        "key": "Ubuntu/python-scrapy",
        "name": "python-scrapy",
        "strategy": "distro"
      }
    ]
  },
  "details": "Scrapy is a high-level web crawling and scraping framework for Python. From 1.4.0 until 2.14.2, RefererMiddleware in scrapy/spidermiddlewares/referer.py treated a Referrer-Policy response-header value that resembled a Python import path as a referrer policy class, imported the referenced object, and called it. A malicious website could supply a callable such as sys.exit and terminate a crawler processing the response. This issue is fixed in version 2.14.2.",
  "id": "BREW-scrapy-GHSA-cwxj-rr6w-m6w7",
  "modified": "2026-10-08T16:23:33Z",
  "published": "2026-08-13T17:34:19Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/scrapy/scrapy/releases/tag/2.14.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105782.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/scrapy/scrapy/security/advisories/GHSA-cwxj-rr6w-m6w7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105782"
    },
    {
      "type": "FIX",
      "url": "https://github.com/scrapy/scrapy/commit/945b787a263586cb5803c01c6da57daad8997ae5"
    },
    {
      "type": "FIX",
      "url": "https://github.com/scrapy/scrapy/commit/b6e5c58ae707a3d4bb491537b5519534050047e0"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware",
  "upstream": [
    "GHSA-cwxj-rr6w-m6w7",
    "CVE-2026-105782"
  ]
}

CVE-2026-105782 (GCVE-0-2026-105782)

Vulnerability from cvelistv5 – Published: 2026-10-05 23:08 – Updated: 2026-10-06 13:44

Title

Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-06 13:40 UTC

CWE

CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7606 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/scrapy/scrapy/security/advisor…	x_refsource_CONFIRM
https://github.com/scrapy/scrapy/commit/945b787a2…	x_refsource_MISC
https://github.com/scrapy/scrapy/commit/b6e5c58ae…	x_refsource_MISC
https://github.com/scrapy/scrapy/releases/tag/2.14.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
scrapy	scrapy	Affected: >= 1.4.0, < 2.14.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-105782",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-06T13:40:40.903121Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-06T13:44:10.445Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "scrapy",
          "vendor": "scrapy",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.4.0, \u003c 2.14.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Scrapy is a high-level web crawling and scraping framework for Python. From 1.4.0 until 2.14.2, RefererMiddleware in scrapy/spidermiddlewares/referer.py treated a Referrer-Policy response-header value that resembled a Python import path as a referrer policy class, imported the referenced object, and called it. A malicious website could supply a callable such as sys.exit and terminate a crawler processing the response. This issue is fixed in version 2.14.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-470",
              "description": "CWE-470: Use of Externally-Controlled Input to Select Classes or Code (\u0027Unsafe Reflection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-05T23:08:55.749Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/scrapy/scrapy/security/advisories/GHSA-cwxj-rr6w-m6w7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/scrapy/scrapy/security/advisories/GHSA-cwxj-rr6w-m6w7"
        },
        {
          "name": "https://github.com/scrapy/scrapy/commit/945b787a263586cb5803c01c6da57daad8997ae5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/scrapy/scrapy/commit/945b787a263586cb5803c01c6da57daad8997ae5"
        },
        {
          "name": "https://github.com/scrapy/scrapy/commit/b6e5c58ae707a3d4bb491537b5519534050047e0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/scrapy/scrapy/commit/b6e5c58ae707a3d4bb491537b5519534050047e0"
        },
        {
          "name": "https://github.com/scrapy/scrapy/releases/tag/2.14.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/scrapy/scrapy/releases/tag/2.14.2"
        }
      ],
      "source": {
        "advisory": "GHSA-cwxj-rr6w-m6w7",
        "discovery": "UNKNOWN"
      },
      "title": "Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-105782",
    "datePublished": "2026-10-05T23:08:55.749Z",
    "dateReserved": "2026-10-05T20:37:19.362Z",
    "dateUpdated": "2026-10-06T13:44:10.445Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-CWXJ-RR6W-M6W7

Vulnerability from github – Published: 2026-03-13 20:02 – Updated: 2026-10-05 23:08

Summary

Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware

Details

Impact

Since version 1.4.0, Scrapy respects the Referrer-Policy response header to decide whether and how to set a Referer header on follow-up requests.

If the header value looked like a valid Python import path, Scrapy would import the referenced object and call it, assuming it referred to a referrer policy class (for example, scrapy.spidermiddlewares.referer.DefaultReferrerPolicy) and attempting to instantiate it to handle the Referer header.

A malicious site could exploit this by setting Referrer-Policy to a path such as sys.exit, causing Scrapy to import and execute it and potentially terminate the process.

Patches

Upgrade to Scrapy 2.14.2 (or later).

Workarounds

If you cannot upgrade to Scrapy 2.14.2, consider the following mitigations.

Disable the middleware: If you don't need the Referer header on follow-up requests, set REFERER_ENABLED to False.
Set headers manually: If you do need a Referer, disable the middleware and set the header explicitly on the requests that require it.
Set referrer_policy in request metadata: If disabling the middleware is not viable, set the referrer_policy request meta key on all requests to prevent evaluating preceding responses' Referrer-Policy. For example:

Request(
    url,
    meta={
        "referrer_policy": "scrapy.spidermiddlewares.referer.DefaultReferrerPolicy",
    },
)

Instead of editing requests individually, you can:

implement a custom spider middleware that runs before the built-in referrer policy middleware and sets the referrer_policy meta key; or
set the meta key in start requests and use the scrapy-sticky-meta-params plugin to propagate it to follow-up requests.

If you want to continue respecting legitimate Referrer-Policy headers while protecting against malicious ones, disable the built-in referrer policy middleware by setting it to None in SPIDER_MIDDLEWARES and replace it with the fixed implementation from Scrapy 2.14.2.

If the Scrapy 2.14.2 implementation is incompatible with your project (for example, because your Scrapy version is older), copy the corresponding middleware from your Scrapy version, apply the same patch, and use that as a replacement.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.14.1"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "Scrapy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.4.0"
            },
            {
              "fixed": "2.14.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-105782"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-470"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-13T20:02:36Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nSince version 1.4.0, Scrapy respects the `Referrer-Policy` response header to decide whether and how to set a `Referer` header on follow-up requests.\n\nIf the header value looked like a valid Python import path, Scrapy would import the referenced object and call it, assuming it referred to a referrer policy class (for example, `scrapy.spidermiddlewares.referer.DefaultReferrerPolicy`) and attempting to instantiate it to handle the `Referer` header.\n\nA malicious site could exploit this by setting `Referrer-Policy` to a path such as `sys.exit`, causing Scrapy to import and execute it and potentially terminate the process.\n\n### Patches\n\nUpgrade to Scrapy 2.14.2 (or later).\n\n### Workarounds\n\nIf you cannot upgrade to Scrapy 2.14.2, consider the following mitigations.\n\n- **Disable the middleware:** If you don\u0027t need the `Referer` header on follow-up requests, set [`REFERER_ENABLED`](https://docs.scrapy.org/en/latest/topics/spider-middleware.html#referer-enabled) to `False`.\n- **Set headers manually:** If you do need a `Referer`, disable the middleware and set the header explicitly on the requests that require it.\n- **Set `referrer_policy` in request metadata:** If disabling the middleware is not viable, set the [`referrer_policy`](https://docs.scrapy.org/en/latest/topics/spider-middleware.html#referrer-policy) request meta key on all requests to prevent evaluating preceding responses\u0027 `Referrer-Policy`. For example:\n\n```python\nRequest(\n    url,\n    meta={\n        \"referrer_policy\": \"scrapy.spidermiddlewares.referer.DefaultReferrerPolicy\",\n    },\n)\n```\n\nInstead of editing requests individually, you can:\n\n- implement a custom [spider middleware](https://docs.scrapy.org/en/latest/topics/spider-middleware.html) that runs before the built-in referrer policy middleware and sets the `referrer_policy` meta key; or\n- set the meta key in start requests and use the [scrapy-sticky-meta-params](https://github.com/heylouiz/scrapy-sticky-meta-params) plugin to propagate it to follow-up requests.\n\nIf you want to continue respecting legitimate `Referrer-Policy` headers while protecting against malicious ones, disable the built-in referrer policy middleware by setting it to `None` in [`SPIDER_MIDDLEWARES`](https://docs.scrapy.org/en/latest/topics/settings.html#std-setting-SPIDER_MIDDLEWARES) and replace it with the fixed implementation from Scrapy 2.14.2.\n\nIf the Scrapy 2.14.2 implementation is incompatible with your project (for example, because your Scrapy version is older), copy the corresponding middleware from your Scrapy version, apply the same patch, and use that as a replacement.",
  "id": "GHSA-cwxj-rr6w-m6w7",
  "modified": "2026-10-05T23:08:58Z",
  "published": "2026-03-13T20:02:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/scrapy/scrapy/security/advisories/GHSA-cwxj-rr6w-m6w7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/scrapy/scrapy/commit/945b787a263586cb5803c01c6da57daad8997ae5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/scrapy/scrapy"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Scrapy: Arbitrary Module Import via Referrer-Policy Header in RefererMiddleware"
}

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.

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.

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Action not permitted

BREW-SCRAPY-GHSA-CWXJ-RR… (GHSA-CWXJ-RR6W-M6W7)

CVE-2026-105782 (GCVE-0-2026-105782)

GHSA-CWXJ-RR6W-M6W7

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature

Related by attack behaviour