Vulnerability · Published Oct 31, 2025 · Assigned by @huntr_ai
CVE-2025-6176Brotli decompression bomb DoS in scrapy/scrapy
High 7.5
In plain English
A high-severity uncontrolled resource consumption in scrapy/scrapy from scrapy. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | brotli | 1.1.0-7.el10_1 | ALSA-2026:0845 |
| AlmaLinux:8 | brotli | 1.0.6-4.el8_10 | ALSA-2026:2389 |
| AlmaLinux:9 | brotli | 1.0.9-9.el9_7 | ALSA-2026:2042 |
| AlmaLinux:10 | brotli-devel | 1.1.0-7.el10_1 | ALSA-2026:0845 |
| AlmaLinux:8 | brotli-devel | 1.0.6-4.el8_10 | ALSA-2026:2389 |
| AlmaLinux:9 | brotli-devel | 1.0.9-9.el9_7 | ALSA-2026:2042 |
| AlmaLinux:10 | libbrotli | 1.1.0-7.el10_1 | ALSA-2026:0845 |
| AlmaLinux:9 | libbrotli | 1.0.9-9.el9_7 | ALSA-2026:2042 |
| AlmaLinux:10 | python3-brotli | 1.1.0-7.el10_1 | ALSA-2026:0845 |
| AlmaLinux:8 | python3-brotli | 1.0.6-4.el8_10 | ALSA-2026:2389 |
| AlmaLinux:9 | python3-brotli | 1.0.9-9.el9_7 | ALSA-2026:2042 |
| Debian:12 | python-scrapy | no fix listed | DEBIAN-CVE-2025-6176 |
| Debian:13 | python-scrapy | no fix listed | DEBIAN-CVE-2025-6176 |
| Debian:14 | python-scrapy | 2.13.4-1 | DEBIAN-CVE-2025-6176 |
| PyPI | brotli | 1.2.0 | PYSEC-2026-2401 |
| PyPI | brotli | 1.2.0 | GHSA-2qfp-q593-8484 |
| PyPI | scrapy | 2.13.4 | PYSEC-2026-1906 |
| PyPI | scrapy | 2.13.4 | GHSA-2qfp-q593-8484 |
| Rocky Linux:10 | brotli | 0:1.1.0-7.el10_1 | RLSA-2026:0845 |
| Rocky Linux:8 | brotli | 0:1.0.6-4.el8_10 | RLSA-2026:2389 |
| Rocky Linux:9 | brotli | 0:1.0.9-9.el9_7 | RLSA-2026:2042 |
| Ubuntu:25.10 | python-scrapy | no fix listed | UBUNTU-CVE-2025-6176 |
| Ubuntu:26.04:LTS | python-scrapy | no fix listed | UBUNTU-CVE-2025-6176 |
| Ubuntu:26.10 | python-scrapy | no fix listed | UBUNTU-CVE-2025-6176 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| scrapy | scrapy/scrapy | unspecified – through latest |
Weakness: CWE-400 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H