CVE-2026-85719

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{"bugzilla": {"description": "AsyncHttpClient: AsyncHttpClient: SOCKS proxy credentials exposed to origin server", "id": "2536134", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536134"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-201", "details": ["The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.1.0 until 2.16.1 and 3.0.12, requests using an authenticated SOCKS proxy can expose the proxy's credentials to the origin because NettyRequestFactory and NettyRequestSender attach Proxy-Authorization without confirming that the request is being sent to an HTTP proxy. With preemptive proxy authentication, the header is attached to a plaintext HTTP request, exposing credentials such as directly reversible Basic credentials to the origin. With the default non-preemptive flow, a hostile origin can return a 407 response and ProxyUnauthorized407Interceptor sends the proxy credentials through the existing SOCKS tunnel, including NTLM, Kerberos, and SPNEGO credentials. Releases before 2.1.0 lack SOCKS proxy support. This issue is fixed in versions 2.16.1 and 3.0.12.", "A flaw was found in AsyncHttpClient. This vulnerability allows an attacker to expose SOCKS proxy credentials to the origin server when using an authenticated SOCKS proxy. This occurs because the library attaches Proxy-Authorization headers without verifying if the request is being sent to an HTTP proxy. Depending on the authentication flow, this can lead to the disclosure of sensitive credentials, such as Basic, NTLM, Kerberos, or SPNEGO, to a potentially hostile origin server."], "name": "CVE-2026-85719", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "async-http-client", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-09-17T15:52:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-85719\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-85719\nhttps://github.com/AsyncHttpClient/async-http-client/commit/4d887704dec22027310f66c81503226722e9bd23\nhttps://github.com/AsyncHttpClient/async-http-client/commit/718ed2e86126663a88ea3db7a88cbbf93f0069b5\nhttps://github.com/AsyncHttpClient/async-http-client/commit/abaa8bd260beda3b85825ff95069ed11eaf4ca8d\nhttps://github.com/AsyncHttpClient/async-http-client/commit/be439b2ec773d12d61914c238d3e8eeaa6f0ba21\nhttps://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x5w6-vm3f-pp6f"], "threat_severity": "Important"}

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