CVE-2026-48830 Details
Description
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
An authentication bypass vulnerability has been identified in Apache bRPC versions through 1.17.0. This issue allows remote unauthenticated attackers to bypass authentication for protected non-builtin HTTP endpoints. The vulnerability arises when 'ServerOptions.auth' is enabled and builtin HTTP services are exposed on the public listener. An attacker can send a builtin HTTP request as the first message on a socket, which may then be treated as authenticated for subsequent requests on the same socket. This exploitation can be used to access ordinary authenticated services without valid credentials.
Users are advised to upgrade to Apache bRPC version 1.18.0 or later, which addresses this vulnerability. Alternatively, the patch available in PR #3308 can be applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 21, 2026CISA-ADP
Assessed Oct 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb | [email protected] | AdvisoryBundleMailing ListRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Apache bRPC | <= 1.17.0 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | CVE Translated | [email protected] |
| Oct 21, 2026 | New CVE Received | [email protected] |