{"schema_version":"1.7.2","id":"OESA-2026-2816","modified":"2026-07-06T06:26:29Z","published":"2026-07-06T06:26:29Z","upstream":["CVE-2026-9375"],"summary":"python-urllib3 security update","details":"HTTP library with thread-safe connection pooling, file post support, sanity friendly, and more.\r\n\r\nSecurity Fix(es):\n\nurllib3 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` protection introduced in version 2.6.0 to mitigate CVE-2025-66471. Specifically, negative `max_length` values can be produced due to buffer arithmetic in `read()`, `flush_decoder` unconditionally overrides `max_length` to `-1`, and `_flush_decoder()` passes no limit at all, defaulting to unlimited decompression. This allows a malicious HTTP server to trigger an out-of-memory (OOM) condition by decompressing large payloads into memory, leading to a denial of service (DoS). The vulnerability affects urllib3 2.6.3 and Brotli 1.2.0 and impacts applications and libraries using `requests` or `urllib3` to stream content from untrusted sources.(CVE-2026-9375)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"python-urllib3","purl":"pkg:rpm/openEuler/python-urllib3&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.18-9.oe2403sp3"}]}],"ecosystem_specific":{"noarch":["python3-urllib3-1.26.18-9.oe2403sp3.noarch.rpm"],"src":["python-urllib3-1.26.18-9.oe2403sp3.src.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2816"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9375"}],"database_specific":{"severity":"High"}}