Resource exhaustion in Urllib3 Urllib3/urllib3
CVE-2026-9375
urllib3 version 2.6.3 is vulnerable to a decompression bomb bypass in its streaming API (`preload_content=False`) when using Brotli support. The issue arises due to three independent code paths in `response.py` that bypass the `max_length`…
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Urllib3 Urllib3/urllib3 — versions unspecified
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-9375?
- CVE-2026-9375 is a high-severity vulnerability in Urllib3 Urllib3/urllib3, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-19.
- How severe is CVE-2026-9375?
- High severity. CVSS v3 base score is 7.5 out of 10.