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TI-2025-05586 Aliases CVE-2025-6176GHSA-2qfp-q593-8484

Brotli decompression bomb DoS in scrapy/scrapy

Priority HIGH 72CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 46 fixed, 3 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00533 45th percentileScored 2026-11-07
Fix Partial brotli (PyPI): 1.2.0Scrapy (PyPI): 2.13.4Red Hat: 26 advisoriesRed Hat: 46 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
scrapyscrapy/scrapyup to latest—No fix listedCNA
—brotli (PyPI)before 1.2.01.2.0Patch availableGHSA-2qfp-q593-8484
—Scrapy (PyPI)before 2.13.42.13.4Patch availableGHSA-2qfp-q593-8484
  • scrapy/scrapy Vendorscrapy Affected up to latest Fixed in — No fix listed CNA
  • brotli (PyPI) Vendor— Affected before 1.2.0 Fixed in 1.2.0 Patch available GHSA-2qfp-q593-8484
  • Scrapy (PyPI) Vendor— Affected before 2.13.4 Fixed in 2.13.4 Patch available GHSA-2qfp-q593-8484

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:scrapy:scrapy:*:*:*:*:*:*:*:*——scrapy
  • cpe:2.3:a:scrapy:scrapy:*:*:*:*:*:*:*:* Versions — — ·scrapy

Remediation

  • Fix · GHSA-2qfp-q593-8484 brotli (PyPI) Fixed in 1.2.0 Advisory →
  • Fix · GHSA-2qfp-q593-8484 Scrapy (PyPI) Fixed in 2.13.4 Advisory →

Red Hat 26 advisories

  • RHSA-2026:5971 Released 2026-03-26 · Red Hat rating Important
    Satellite 6.16.7 Async Update
    • Red Hat Satellite 6.16 for RHEL 8 foreman-3.12.0.14-1.el8sat, foreman-cli-3.12.0.14-1.el8sat, foreman-debug-3.12.0.14-1.el8sat +20
    • Red Hat Satellite 6.16 for RHEL 9 foreman-3.12.0.14-1.el9sat, foreman-cli-3.12.0.14-1.el9sat, foreman-debug-3.12.0.14-1.el9sat +20
  • RHSA-2026:5970 Released 2026-03-26 · Red Hat rating Important
    Satellite 6.17.7 Async Update
    • Red Hat Satellite 6.17 for RHEL 9 foreman-3.14.0.14-1.el9sat, foreman-cli-3.14.0.14-1.el9sat, foreman-debug-3.14.0.14-1.el9sat +33
  • RHSA-2026:4465 Released 2026-03-19 · Red Hat rating Important
    OpenShift Container Platform 4.16.58 bug fix and security update
    • Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202603112010-0, rhcos-ppc64le-416.94.202603112010-0, rhcos-s390x-416.94.202603112010-0 +1
Show 23 more Red Hat advisories
  • RHSA-2026:4419 Released 2026-03-19 · Red Hat rating Important
    OpenShift Container Platform 4.15.62 bug fix and security update
    • Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202603101737-0, rhcos-ppc64le-415.92.202603101737-0, rhcos-s390x-415.92.202603101737-0 +1
  • RHSA-2026:3861 Released 2026-03-12 · Red Hat rating Important
    OpenShift Container Platform 4.12.86 bug fix and security update
    • Red Hat OpenShift Container Platform 4.12 rhcos-x86_64-412.86.202603041314-0
  • RHSA-2026:3415 Released 2026-03-05 · Red Hat rating Important
    OpenShift Container Platform 4.13.64 bug fix and security update
    • Red Hat OpenShift Container Platform 4.13 rhcos-x86_64-413.92.202602240113-0
  • RHSA-2026:3392 Released 2026-03-04 · Red Hat rating Important
    OpenShift Container Platform 4.19.25 bug fix and security update
    • Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202602252137-0, rhcos-ppc64le-4.19.9.6.202602252137-0, rhcos-s390x-4.19.9.6.202602252137-0 +1
  • RHSA-2026:3417 Released 2026-03-04 · Red Hat rating Important
    OpenShift Container Platform 4.17.50 bug fix and security update
    • Red Hat OpenShift Container Platform 4.17 rhcos-aarch64-417.94.202602251654-0, rhcos-ppc64le-417.94.202602251654-0, rhcos-s390x-417.94.202602251654-0 +1
  • RHSA-2026:2974 Released 2026-02-26 · Red Hat rating Important
    OpenShift Container Platform 4.14.62 bug fix and security update
    • Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202602171627-0, rhcos-ppc64le-414.92.202602171627-0, rhcos-s390x-414.92.202602171627-0 +1
  • RHSA-2026:3406 Released 2026-02-26 · Red Hat rating Important
    New container image: rhceph-9.0
    • Red Hat Ceph Storage 9 registry.redhat.io/rhceph/grafana-rhel10, registry.redhat.io/rhceph/rhceph-9-rhel9
  • RHSA-2026:2976 Released 2026-02-25 · Red Hat rating Important
    OpenShift Container Platform 4.18.34 bug fix and security update
    • Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202602172219-0, rhcos-ppc64le-418.94.202602172219-0, rhcos-s390x-418.94.202602172219-0 +1
  • RHSA-2026:2844 Released 2026-02-17 · Red Hat rating Important
    Red Hat OpenShift Dev Spaces 3.26.1 Release.
    • Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 registry.redhat.io/devspaces/code-sshd-rhel9, registry.redhat.io/devspaces/configbump-rhel9, registry.redhat.io/devspaces/dashboard-rhel9 +8
  • RHSA-2026:2800 Released 2026-02-17 · Red Hat rating Important
    Red Hat Ceph Storage
    • Red Hat Ceph Storage 7 registry.redhat.io/rhceph/grafana-rhel9, registry.redhat.io/rhceph/rhceph-7-rhel9
  • RHSA-2026:2737 Released 2026-02-16 · Red Hat rating Important
    Red Hat Ceph Storage
    • Red Hat Ceph Storage 8 registry.redhat.io/rhceph/grafana-rhel9, registry.redhat.io/rhceph/rhceph-8-rhel9
  • RHSA-2026:2455 Released 2026-02-10 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) brotli-devel-1.0.6-4.el8_6, python3-brotli-1.0.6-4.el8_6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) brotli-devel-1.0.6-4.el8_6, python3-brotli-1.0.6-4.el8_6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) brotli-devel-1.0.6-4.el8_6, python3-brotli-1.0.6-4.el8_6
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) brotli-1.0.6-4.el8_6
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) brotli-1.0.6-4.el8_6
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) brotli-1.0.6-4.el8_6
  • RHSA-2026:2400 Released 2026-02-10 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) brotli-devel-1.0.6-4.el8_8, python3-brotli-1.0.6-4.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) brotli-devel-1.0.6-4.el8_8, python3-brotli-1.0.6-4.el8_8
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) brotli-1.0.6-4.el8_8
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) brotli-1.0.6-4.el8_8
  • RHSA-2026:2399 Released 2026-02-10 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) brotli-devel-1.0.6-4.el8_4, python3-brotli-1.0.6-4.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) brotli-devel-1.0.6-4.el8_4, python3-brotli-1.0.6-4.el8_4
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) brotli-1.0.6-4.el8_4
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) brotli-1.0.6-4.el8_4
  • RHSA-2026:2401 Released 2026-02-10 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) brotli-1.0.6-1.el8_2.1
  • RHSA-2026:2389 Released 2026-02-10 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream (v. 8) brotli-devel-1.0.6-4.el8_10, python3-brotli-1.0.6-4.el8_10
    • Red Hat Enterprise Linux BaseOS (v. 8) brotli-1.0.6-4.el8_10
  • RHSA-2026:2227 Released 2026-02-09 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) brotli-1.0.9-6.el9_4.1, brotli-devel-1.0.9-6.el9_4.1, python3-brotli-1.0.9-6.el9_4.1
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) brotli-1.0.9-6.el9_4.1, libbrotli-1.0.9-6.el9_4.1
  • RHSA-2026:2229 Released 2026-02-09 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) brotli-1.0.9-7.el9_6.1, brotli-devel-1.0.9-7.el9_6.1, python3-brotli-1.0.9-7.el9_6.1
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) brotli-1.0.9-7.el9_6.1, libbrotli-1.0.9-7.el9_6.1
  • RHSA-2026:2228 Released 2026-02-09 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) brotli-1.0.9-6.el9_2.1, brotli-devel-1.0.9-6.el9_2.1, python3-brotli-1.0.9-6.el9_2.1
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) brotli-1.0.9-6.el9_2.1, libbrotli-1.0.9-6.el9_2.1
  • RHSA-2026:2226 Released 2026-02-09 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) brotli-1.0.9-6.el9_0.1, brotli-devel-1.0.9-6.el9_0.1, python3-brotli-1.0.9-6.el9_0.1
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) brotli-1.0.9-6.el9_0.1, libbrotli-1.0.9-6.el9_0.1
  • RHSA-2026:2042 Released 2026-02-05 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream (v. 9) brotli-1.0.9-9.el9_7, brotli-devel-1.0.9-9.el9_7, python3-brotli-1.0.9-9.el9_7
    • Red Hat Enterprise Linux BaseOS (v. 9) brotli-1.0.9-9.el9_7, libbrotli-1.0.9-9.el9_7
  • RHSA-2026:0845 Released 2026-01-20 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream (v. 10) brotli-1.1.0-7.el10_1, brotli-devel-1.1.0-7.el10_1, python3-brotli-1.1.0-7.el10_1
    • Red Hat Enterprise Linux BaseOS (v. 10) brotli-1.1.0-7.el10_1, libbrotli-1.1.0-7.el10_1
  • RHSA-2026:0008 Released 2026-01-05 · Red Hat rating Important
    brotli security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) brotli-1.1.0-6.el10_0.1, brotli-devel-1.1.0-6.el10_0.1, python3-brotli-1.1.0-6.el10_0.1
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) brotli-1.1.0-6.el10_0.1, libbrotli-1.1.0-6.el10_0.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2AffectedNo fix yet
Red Hat Ceph Storage 8AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
Red Hat Ceph Storage 7Fixed RHSA-2026:2800
Red Hat Ceph Storage 8Fixed RHSA-2026:2737
Red Hat Ceph Storage 9Fixed RHSA-2026:3406
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:0845
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:2389
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:2042
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:2399
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:2400
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:2226
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:2228
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:0008
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:2227
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:2229
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:2399
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:2400
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:0845
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:2389
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:2042
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2026:2401
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:2399
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:2400
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:2226
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:2228
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:0008
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:2227
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:2229
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:2399
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:2455
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:2400
Red Hat OpenShift Container Platform 4.12Fixed RHSA-2026:3861
Red Hat OpenShift Container Platform 4.13Fixed RHSA-2026:3415
Red Hat OpenShift Container Platform 4.14Fixed RHSA-2026:2974
Red Hat OpenShift Container Platform 4.15Fixed RHSA-2026:4419
Red Hat OpenShift Container Platform 4.16Fixed RHSA-2026:4465
Red Hat OpenShift Container Platform 4.17Fixed RHSA-2026:3417
Red Hat OpenShift Container Platform 4.18Fixed RHSA-2026:2976
Red Hat OpenShift Container Platform 4.19Fixed RHSA-2026:3392
Red Hat OpenShift Dev Spaces (RHOSDS) 3.26Fixed RHSA-2026:2844
Red Hat Satellite 6.16 for RHEL 8Fixed RHSA-2026:5971
Red Hat Satellite 6.16 for RHEL 9Fixed RHSA-2026:5971
Red Hat Satellite 6.17 for RHEL 9Fixed RHSA-2026:5970
Not affected: 11 products
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ceph Storage 7
  • Red Hat Ceph Storage 8
  • Red Hat Ceph Storage 9
  • Red Hat JBoss Core Services
  • Red Hat OpenShift Dev Spaces (RHOSDS) 3.26
  • Red Hat Satellite 6
  • Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Update Infrastructure 4 for Cloud Providers
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-6176
  2. 2026-10-03 Alias added: GHSA-2qfp-q593-8484
  3. 2026-10-09 Affected versions changed · Red Hat

References

Advisory 1

Other 9

  • TI-2024-03333 Authorization Header Leak During Cross-Domain Redirect in scrapy/scrapy CVSS 3.0HIGH 7.5
  • TI-2024-03331 XML External Entity (XXE) Vulnerability in scrapy/scrapy CVSS 3.0HIGH 7.5
  • TI-2024-01831 Authorization Header Leakage in scrapy/scrapy on Scheme Change Redirects CVSS 3.0HIGH 7.5
  • TI-2026-68383 Arbitrary module import via Referrer-Policy header in Scrapy CVSS 3.1HIGH 7.5
  • TI-2026-40066 Protego: Exponential backtracking ReDoS in robots.txt URL wildcard matching CVSS 4.0HIGH 7.1
  • TI-2017-10313 Scrapy 1.4 allows remote attackers to cause a denial of service (memory consumption) via… CVSS 3.0HIGH 7.5
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences