Apache bRPC: HTTP builtin request can mark a connection authenticated and bypass auth for later requests

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-48830
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 12:17:20 UTC
Updated2026-10-26 21:10:00 UTC
DescriptionImproper 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

Risk And Classification

EPSS: 0.002630000 probability, percentile 0.180480000 (date 2026-10-26)

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache BRPC affected 1.17.0 semver all
CNA Apache Software Foundation Apache BRPC unaffected 1.18.0 semver all

References

ReferenceSourceLinkTags
lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Brubbish of VARAS@IIE (en)

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