Apache bRPC: Authentication bypass when a server sets ServerOptions.internal_port and ServerOptions.auth

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86249
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 13:20:04 UTC
Updated2026-10-21 13:20:04 UTC
DescriptionOn 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().

Risk And Classification

Problem Types: CWE-287 | CWE-287 CWE-287 Improper Authentication

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache BRPC affected 1.18.0 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb [email protected] lists.apache.org
github.com/apache/brpc/pulls/3525 [email protected] github.com
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