CVE-2023-43804

CVE-2023-43804 affects the Python urllib3 library, where a Cookie header may be leaked across cross-origin redirects if redirects are not disabled. The issue is resolved in urllib3 1.26.17 or 2.0.5. Affected environments are confirmed in multiple reports, including AlmaLinux and Brocade advisorie...

CVE-2026-21441

CVE-2026-21441 (urllib3) : The issue occurs in urllib3’s streaming API where, for HTTP redirect responses, the client decompresses the entire response body even before any reads are issued, enabling potential resource exhaustion (CPU/memory) via decompression bombs. Affected versions are prior to...

CVE-2026-44432

CVE-2026-44432 affects urllib3 before 2.7.0, where the library could decompress the entire response during HTTPResponse.read or drain_conn, leading to high CPU and memory usage when handling highly compressed data. Affected versions: 2.6.0 up to (but not including) 2.7.0. Impact described as pote...

CVE-2026-44431

CVE-2026-44431 affects urllib3 (Python HTTP client). From versions 1.23 up to, but not including, 2.7.0, cross-origin redirects followed by the low‑level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward sensitive headers. This constitutes a leakage of ...

CVE-2025-66471

CVE-2025-66471 affects urllib3’s streaming API handling of compressed HTTP responses in Python. The issue arises when streaming a highly compressed payload, where decompression could process data in a way that uses excessive CPU and memory, potentially from the decompression buffer behavior noted...

CVE-2025-66418

The connected advisories confirm CVE-2025-66418 affects urllib3 (Python) via an unbounded decompression chain in versions 1.24 up to before 2.6.0, enabling high CPU and memory usage; remediation is to upgrade to 2.6.0 or later. Additional advisories note related issues: CVE-2025-66471 (Streaming ...