## Impact urllib3 supports chained HTTP encoding algorithms for response content according to RFC 9110 (e.g., `Content-Encoding: gzip, zstd`). However, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. ## Affected usages Applications and libraries using urllib3 version 2.5.0 and earlier for HTTP requests to untrusted sources unless they disable content decoding explicitly. ## Remediation Upgrade to at least urllib…
GHSA-gm62-xv2j-4w53: urllib3 allows an unbounded number of links in the decompression chain
urllib3 versions 2.5.0 and earlier allow unbounded decompression chains, enabling malicious servers to cause high CPU usage and memory allocation via chained HTTP encoding algorithms.