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Apache bRPC: TLS Client Accepts Certificates for Mismatched Peer Names

Type: advisorySource: Official CVE List1 source record

Apache bRPC versions before 1.18.0 validate the server certificate chain when client TLS peer verification is enabled, but do not bind the certificate to an expected DNS name or IP address. A network attacker who can redirect or intercept a connection and who possesses a certificate issued by a CA trusted by the client for another name may impersonate the requested TLS endpoint. Affected Scenarios: Applications use a bRPC client Channel to connect to an untrusted network with certificate verification enabled and trust a CA that can issue certificates for identities other than the intended endpoint. How to Fix: Upgrade to Apache bRPC 1.18.0 and enable VERIFY_PEER with a positive verify_depth. HTTPS Channels automatically verify the certificate against the host in the Channel URL. Callers may set VerifyOptions::expected_peer_name explicitly when the certificate identity differs from the URL host. Alternatively, apply the patch from https://github.com/apache/brpc/pull/3408 . Note: The new option performs DNS SAN or IP SAN verification during the TLS handshake. Configurations that set expected_peer_name while peer verification is disabled are rejected.

Announced Source revision 1
Original source ↗

CVE-2026-66392

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-66392

Apache bRPC

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache bRPC",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.18.0",
        "versionType": "semver"
      }
    ],
    "packageURL": "pkg:github/apache/brpc",
    "packageName": "apache/brpc",
    "collectionURL": "https://github.com",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-66392

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#45856 · Revision 1
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