---
id: CVE-2026-48830
title: >-
  Apache bRPC: HTTP builtin request can mark a connection authenticated and
  bypass auth for later requests
summary: >-
  Improper authentication in Apache bRPC through 1.17.0 allows a remote
  unauthenticated attacker to bypass authentication for protected non-builtin
  HTTP endpoints by first sending a builtin HTTP request on the same HTTP/1.1
  keep-alive conn…
severity: none
cwe:
  - CWE-287
vendor: Apache Software Foundation
product: apache/brpc
affected:
  - apache/brpc <= 1.17.0
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T11:30:15.288Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-48830'
references:
  - url: 'https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb'
tags:
  - cve.org
ingestedAt: '2026-10-21T11:47:58.157Z'
---

## Overview

Improper authentication in Apache bRPC through 1.17.0 allows a remote unauthenticated attacker to bypass authentication for protected non-builtin HTTP endpoints by first sending a builtin HTTP request on the same HTTP/1.1 keep-alive connection.

When ServerOptions.auth is enabled and builtin HTTP services are exposed on the public listener, a builtin request received as the first message on a socket may cause the connection to be treated as authenticated for later requests on that socket. Users are recommended to upgrade to version 1.18.0, which fixes this issue, or apply this PR separately:  https://github.com/apache/brpc/pull/3308

## Affected

- `apache/brpc <= 1.17.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.