{"schema_version": "1.6.1", "id": "CVE-2026-64607", "summary": "Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS", "details": "HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model.\n\nThis issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "5.0-alpha"}, {"last_affected": "5.0-alpha"}]}]}], "references": [{"type": "WEB", "url": "https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q"}]}