Vulnerability in Python Urllib3
CVE-2026-44432
urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed u…
EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Python Urllib3
- Urllib3 — versions >= 2.6.0, < 2.7.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-44432?
- CVE-2026-44432 is a high-severity vulnerability in Python Urllib3, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-05-13.
- How severe is CVE-2026-44432?
- High severity. CVSS v3 base score is 7.5 out of 10.