CVE-2026-86249
Full vulnerability record from the local CVENow database.
Description
On a brpc::Server that sets both ServerOptions.auth and ServerOptions.internal_port, the HTTP built-in service exemption on internal_port can be abused to bypass authentication entirely. VerifyHttpRequest() returns true without checking any credential when a built-in service is requested on internal_port, and this verdict is not per - request: verification runs only for the first message of a connection and the result latches the connection. Sending a request such as GET /status to internal_port first authenticates the whole connection, after which every subsequent request dispatched on the same connection is handled without ever calling VerifyHttpRequest(). This lets a remote attacker reach ordinary (non-built-in, non-tabbed) authenticated services without supplying valid credentials whenever the server uses ServerOptions.internal_port together with an Authenticator. The fix restricts internal_port so that it carries only built-in and Tabbed services; requests for ordinary services sent to internal_port are rejected with EPREM / HTTP 403. Mitigation / Fix: upgrade to 1.18.0 or apply PR https://github.com/apache/brpc/pull/3525 . Users who rely on serving normal services on internal_port must move those requests to the port passed to Server::Start().
View original CVE JSON
{
"id": "CVE-2026-86249",
"sourceIdentifier": "[email protected]",
"published": "2026-10-21T13:20:04.470",
"lastModified": "2026-10-22T16:56:37.023",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "On a brpc::Server that sets both ServerOptions.auth and ServerOptions.internal_port, the HTTP built-in service exemption on internal_port can be abused to bypass authentication entirely. VerifyHttpRequest() returns true without checking any credential when a built-in service is requested on internal_port, and this verdict is not per - request: verification runs only for the first message of a connection and the result latches the connection. Sending a request such as GET /status to internal_port first authenticates the whole connection, after which every subsequent request dispatched on the same connection is handled without ever calling VerifyHttpRequest(). This lets a remote attacker reach ordinary (non-built-in, non-tabbed) authenticated services without supplying valid credentials whenever the server uses ServerOptions.internal_port together with an Authenticator. The fix restricts internal_port so that it carries only built-in and Tabbed services; requests for ordinary services sent to internal_port are rejected with EPREM / HTTP 403. \n\n\n\nMitigation / Fix: upgrade to 1.18.0 or apply PR https://github.com/apache/brpc/pull/3525 . \n\n\n\nUsers who rely on serving normal services on internal_port must move those requests to the port passed to Server::Start()."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Apache Software Foundation",
"product": "Apache bRPC",
"defaultStatus": "unaffected",
"collectionURL": "https://github.com",
"packageName": "apache/brpc",
"packageURL": "pkg:github/apache/brpc",
"versions": [
{
"version": "0",
"lessThan": "1.18.0",
"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-287"
}
]
}
],
"references": [
{
"url": "https://github.com/apache/brpc/pulls/3525",
"source": "[email protected]"
},
{
"url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb",
"source": "[email protected]"
}
]
}