Amazon Linux 2023 — python-h2 — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read • Source: Amazon Linux advisory ALAS2023-2025-1181 Related CVEs: CVE-2025-57804 Upstream summary: h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request […]