{"id":"OESA-2025-1497","summary":"python-h11 security update","details":"h11 is suitable for implementing both servers and clients, and has a pleasantly symmetric API: the events you send as a client are exactly the ones that you receive as a server and vice-versa.\r\n\r\nSecurity Fix(es):\n\nh11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message bodies can lead to request smuggling vulnerabilities under certain conditions. This issue has been patched in version 0.16.0. Since exploitation requires the combination of buggy h11 with a buggy (reverse) proxy, fixing either component is sufficient to mitigate this issue.(CVE-2025-43859)","modified":"2026-08-18T01:19:37.378329031Z","published":"2025-05-09T11:08:35Z","upstream":["CVE-2025-43859"],"database_specific":{"severity":"Critical"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1497"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-43859"}],"affected":[{"package":{"name":"python-h11","ecosystem":"openEuler:24.03-LTS","purl":"pkg:rpm/openEuler/python-h11&distro=openEuler-24.03-LTS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.14.0-2.oe2403"}]}],"ecosystem_specific":{"noarch":["python-h11-help-0.14.0-2.oe2403.noarch.rpm","python3-h11-0.14.0-2.oe2403.noarch.rpm"],"src":["python-h11-0.14.0-2.oe2403.src.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2025-1497.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}