High
python-scrapy — security advisory
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.
- Products
- python-scrapy
- Affected versions
- 1.0.0-1, 1.0.3-1, 1.3.0-1~exp2, 1.4.0-1, 1.5.0-1, 1.5.0-1ubuntu0.1~esm1, 1.7.3-1, 1.7.3-1ubuntu0.1~esm1, 2.10.0-1, 2.11.0-1, 2.11.0-2, 2.11.1-1, 2.11.1-1ubuntu0.1~esm2, 2.12.0-2, 2.14.0-1, 2.14.1-1, 2.17.0-1, 2.18.0-2, 2.4.1-2, 2.5.1-2, 2.5.1-2ubuntu0.1~esm1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-6176
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:30 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2025-6176
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
python-scrapy
Fixed versions: Not specified
Complete source record
{
"id": "caa0f3dbbab38584639effa5a93b785e0381c8b368ce6f7068c480e2b366b4cd",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-6176",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-6176",
"summary": "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.",
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"severity": "high",
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"modified": "2026-10-17T12:58:37.775394855Z",
"provider": "osv",
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"references": [
"https://ubuntu.com/security/CVE-2025-6176",
"https://www.cve.org/CVERecord?id=CVE-2025-6176",
"https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0"
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