{"cve":"CVE-2025-6176","nvd":{"published":"2025-10-31T00:15:37.333","modified":"2026-06-17T10:01:19.720","status":"Deferred","description":"Scrapy versions up to 2.13.2 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-6176","score":0.00545,"percentile":0.4572,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2qfp-q593-8484","url":"https://osv.dev/vulnerability/GHSA-2qfp-q593-8484","summary":"Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation","modified":"2026-09-10T03:50:29.153413546Z","packages":[{"ecosystem":"PyPI","name":"brotli","purl":"pkg:pypi/brotli","ranges":["<1.2.0"],"fixed":["1.2.0"]},{"ecosystem":"PyPI","name":"scrapy","purl":"pkg:pypi/scrapy","ranges":["<2.13.4"],"fixed":["2.13.4"]}]},{"id":"PYSEC-2026-1906","url":"https://osv.dev/vulnerability/PYSEC-2026-1906","summary":"Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation","modified":"2026-07-13T16:43:00.989110436Z","packages":[{"ecosystem":"PyPI","name":"scrapy","purl":"pkg:pypi/scrapy","ranges":["<2.13.4"],"fixed":["2.13.4"]}]},{"id":"PYSEC-2026-2401","url":"https://osv.dev/vulnerability/PYSEC-2026-2401","summary":"Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation","modified":"2026-07-13T16:43:00.989110436Z","packages":[{"ecosystem":"PyPI","name":"brotli","purl":"pkg:pypi/brotli","ranges":["<1.2.0"],"fixed":["1.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}