CVE-2017-14158: Scrapy Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-h7wm-ph43-c39p
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2017-14158 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Scrapy libraries in the PyPI ecosystem. The issue involves scrapy denial of service vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2017-14158 at a Glance

CVE Identifier CVE-2017-14158
GHSA Identifier GHSA-h7wm-ph43-c39p
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Scrapy
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2017-14158

To remediate this vulnerability, upgrade all affected Scrapy dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

scrapy fixed: Latest secure release 
pip install scrapy>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show scrapy

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2017-14158, inspect your installed packages using pip:

pip show scrapy

Analyze the terminal output to locate any version of Scrapy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show scrapy command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Scrapy, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Scrapy 1.4 allows remote attackers to cause a denial of service (memory consumption) via large files because arbitrarily many files are read into memory, which is especially problematic if the files are then individually written in a separate thread to a slow storage resource, as demonstrated by interaction between dataReceived (in core/downloader/handlers/http11.py) and S3FilesStore.

CVE-2017-14158 Affected Scrapy Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
scrapy
pypi/scrapy
PyPI
≥ 0.7
≤ 2.15.2

References

NVD — CVE-2017-14158 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-14158
Scrapy Source Repository REPOSITORY
https://github.com/scrapy/scrapy/issues/482
Scrapy Source Repository REPOSITORY
https://github.com/pypa/advisory-database/blob/8b7a4d62a95e8f605e5dfb4e0b4f299e6403dc12/vulns/scrapy/PYSEC-2017-83.yaml
Scrapy Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/scrapy/PYSEC-2017-83.yaml
Scrapy Source Repository REPOSITORY
https://github.com/scrapy/scrapy
blog.csdn.net/wangtua/article/det... WEB
http://blog.csdn.net/wangtua/article/details/75228728

Frequently Asked Questions

What is CVE-2017-14158?
CVE-2017-14158 is a security vulnerability in Scrapy involving Scrapy denial of service vulnerability under CWE-400: Uncontrolled Resource Consumption.
Which Scrapy versions are affected?
Affected versions include releases prior to current release patches across affected packages: scrapy.
What version fixes CVE-2017-14158?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is scrapy affected?
Yes, scrapy is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2017-14158?
CVE-2017-14158 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2017-14158?
CVE-2017-14158 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2017-14158?
Run the dependency tree command: 'pip show scrapy'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h7wm-ph43-c39p",
  "modified" : "2026-05-20T22:25:25Z",
  "published" : "2022-05-17T01:16:31Z",
  "aliases" : [ "CVE-2017-14158" ],
  "summary" : "Scrapy denial of service vulnerability",
  "details" : "Scrapy 1.4 allows remote attackers to cause a denial of service (memory consumption) via large files because arbitrarily many files are read into memory, which is especially problematic if the files are then individually written in a separate thread to a slow storage resource, as demonstrated by interaction between dataReceived (in core/downloader/handlers/http11.py) and S3FilesStore.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "scrapy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.7"
      }, {
        "last_affected" : "2.15.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-14158"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/scrapy/scrapy/issues/482"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/blob/8b7a4d62a95e8f605e5dfb4e0b4f299e6403dc12/vulns/scrapy/PYSEC-2017-83.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/scrapy/PYSEC-2017-83.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/scrapy/scrapy"
  }, {
    "type" : "WEB",
    "url" : "http://blog.csdn.net/wangtua/article/details/75228728"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-17T21:35:13Z",
    "nvd_published_at" : "2017-09-05T17:29:00Z"
  }
}