CVE-2026-78334— Apache bRPC: Missing Authentication for Streaming RPC Frames
Quick assessment
Affected
Apache Software Foundation Apache bRPC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apache bRPC（版本低于 1.18.0）在所有平台上存在流式 RPC 路径缺少身份验证的漏洞。当服务器配置了身份验证器（Authenticator）时，远程攻击者可绕过服务器身份验证机制，注入或投递流式数据帧。 根本原因： 当启用身份验证时，流式 RPC 数据帧由流式解析器（ ）直接消费，未经过 的身份验证钩子。因此，未经验证的客户端可交换数据帧而无需通过身份验证。此外，服务器接受的流式连接是“惰性绑定”的：它仅在遇到第一个携带其 ID 的数据帧时才完成绑定。这导致攻击者可能从不同于创建该流的套接字（soc
Possible ATT&CK Techniques 2 AI
T1550.004 · Web Session Cookie T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache bRPC | < 1.18.0 |
affected |
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I. Basic Information for CVE-2026-78334
Vulnerability Information
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Vulnerability Title
Apache bRPC: Missing Authentication for Streaming RPC Frames
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authentication in the streaming RPC path of Apache bRPC (version < 1.18.0) on all platforms allows a remote attacker to bypass server authentication and inject or deliver streaming frames, when a server is configured with an Authenticator.
Root Cause:
When authentication is configured, streaming RPC frames are consumed directly by the streaming parser (ParseStreamingMessage) and never pass through InputMessenger's authentication hook, so an unauthenticated peer can exchange frames without being authenticated. In addition, a server-accepted stream is bound lazily to the first frame that happens to carry its id, so a stream could accept a frame carrying its id from a socket other than the socket that created the stream.
Affected Scenarios:
A bRPC server configured with authentication that serves streaming RPC from an untrusted network, or a deployment where a foreign connection can impersonate a stream by id, can be made to accept unauthorized streaming frames.
How to Fix:
Upgrade bRPC to 1.18.0, which fixes this issue, or apply the patch in PR https://github.com/apache/brpc/pull/3481.
Note:
The fix rejects streaming frames on server sockets when configured authentication has not completed, and keeps server-accepted streams bound to the socket of their creating RPC and rejects frames arriving from another socket. Authenticated streaming RPC behavior and the wire format are unchanged; only unauthenticated or foreign-socket frames are now rejected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache bRPC | 0 ~ 1.18.0 | - |
|
II. Public POCs for CVE-2026-78334
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Same Patch Batch · Apache Software Foundation · 2026-10-21 · 69 CVEs total
| CVE-2026-105944 | 10.0 CRITICAL | Apache Pulsar Manager: Missing authentication and authorization and disclosure of the Puls |
| CVE-2026-111812 | 10.0 CRITICAL | Apache Traffic Server: origin_server_auth signs client-controlled AWS headers under the pr |
| CVE-2026-111813 | 10.0 CRITICAL | Apache Traffic Server: magick plugin passes client query strings unfiltered to ImageMagick |
| CVE-2026-111815 | 10.0 CRITICAL | Apache Traffic Server: TLS session ticket resumption bypasses per-SNI verify_client STRICT |
| CVE-2026-111814 | 10.0 CRITICAL | Apache Traffic Server: Default server_session_sharing.match omits MASK_CERT, allowing pool |
| CVE-2026-111809 | 9.3 CRITICAL | Apache Traffic Server: HEAD requests carrying Content-Length or Transfer-Encoding enable r |
| CVE-2026-111816 | 9.3 CRITICAL | Apache Traffic Server: A malformed 302 response bypasses parse-error rejection through the |
| CVE-2026-105869 | 9.2 CRITICAL | Apache Pulsar: MultiRolesTokenAuthorizationProvider uses roles from unverified tokens for |
| CVE-2026-111811 | 9.0 CRITICAL | Apache Traffic Server: tsmemcache plugin exposes the shared proxy cache over the network w |
| CVE-2025-31699 | 8.9 HIGH | Apache Traffic Server: Origin connection still owed a request body is reused, enabling req |
| CVE-2026-105937 | 8.7 HIGH | Apache Pulsar: Missing authorization of the shadow topic source allows cross-tenant messag |
| CVE-2025-55702 | 8.7 HIGH | Apache Traffic Server: An unread Expect: 100-continue request body is framed as a new requ |
| CVE-2026-111808 | 8.6 HIGH | Apache Traffic Server: HTTP/2 DATA frame padding underflow lets a client trigger backend w |
| CVE-2026-111805 | 8.6 HIGH | Apache Traffic Server: HTTP/2 Content-Length truncation lets a client trigger backend work |
| CVE-2026-111804 | 8.2 HIGH | Apache Traffic Server: wasm plugin has a use-after-free and forwards unvalidated guest met |
| CVE-2026-105945 | 7.7 HIGH | Apache Pulsar: Improper Validation of Package Name Components Allows Cross-Tenant Package |
| CVE-2026-105942 | 7.7 HIGH | Apache Pulsar: Original principal of proxied requests authorized with the proxy's authenti |
| CVE-2026-111810 | 7.5 HIGH | Apache Traffic Server: Unthrottled per-header diagnostic logging enables a log-flood denia |
| CVE-2026-105934 | 7.2 HIGH | Apache Pulsar: Missing tenant admin authorization check when truncating a partitioned topi |
| CVE-2026-105930 | 6.0 MEDIUM | Apache Pulsar: Improper Authorization of Function, Source and Sink Package URLs Allows Cro |
Showing top 20 of 69 CVEs. View all on vendor page → →
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