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-2026-21441

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-2026-44431

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-2026-97687

The urllib3 Python HTTP client library (versions 1.26.0 through 2.8.0 ) contains a vulnerability where target-server TLS settings are incorrectly applied to HTTPS proxy connections. Specifically, configurations like proxy_ssl_context, ssl_context, and cert_reqs fail to remain separated, allowing ...

CVE-2026-97689

The urllib3 Python HTTP client library (versions 1.10.3 through 2.8.0 ) is vulnerable to an unbounded memory allocation issue in the HTTPResponse.read_chunked and HTTPResponse.stream methods. The root cause is that the streaming chunk parser buffers the chunk-size field until it encounters a newl...

CVE-2026-97688

The Python HTTP client library urllib3 versions 2.6.2 through 2.8.0 are vulnerable to an infinite loop during chunked Deflate streaming. The issue exists because the Deflate decoder retains trailing bytes as unconsumed input after reaching the end-of-stream, repeatedly decoding them without progr...