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  4. CVE 2026 71297 maestro maestro grpc broker has no auth
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Back to active CVEs
Medium · CVSS 5.4CVE-2026-71297

Maestro: maestro: grpc broker has no auth interceptor and client mtls is optionalCVE-2026-71297

Answer in brief

CVE-2026-71297 records a Medium severity (CVSS 5.4) vulnerability in Maestro: maestro: grpc broker has no auth interceptor and client mtls is optional. The current sources do not mark it as known exploited. The current feed maps Red Hat/multicluster-engine/cloudevents-conductor-rhel9 (generic), Red Hat/multicluster-engine/maestro-rhel9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 5, 2026Updated Oct 5, 2026Source checked Oct 5, 2026First seen by HOL Oct 5, 2026Material review Oct 5, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.4
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/multicluster-engine/cloudevents-conductor-rhel9 (generic), Red Hat/multicluster-engine/maestro-rhel9 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/multicluster-engine/cloudevents-conductor-rhel9generic*Not reported
Red Hat/multicluster-engine/maestro-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/multicluster-engine/cloudevents-conductor-rhel9, Red Hat/multicluster-engine/maestro-rhel9.
  2. 2Review the reported fix. Source-reported workaround: To mitigate this issue, ensure that client mTLS is enabled for the Maestro gRPC broker by configuring the `BrokerClientCAFile` parameter. If the gRPC message broker type is not required, avoid enabling it. If the gRPC broker is in use, a restart or service reload may be required after applying the configuration changes.

Evidence timeline and material changes

  1. Published upstream

    Oct 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 5, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in the maestro gRPC broker. This vulnerability allows a remote attacker, with a valid client certificate, to bypass authentication. This bypass enables the attacker to subscribe to other consumers' event streams, leading to unauthorized information disclosure, or to publish forged agent status, which can compromise data integrity.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Maestro: sql identifier injection via properties.* search filter and orderby fieldSame red hat/multicluster-engine/cloudevents-conductor-rhel9 package
  • Maestro: maestro: rest api write endpoints registered without authentication middlewareSame red hat/multicluster-engine/cloudevents-conductor-rhel9 package
  • Newell Brands DYMO ID document parsing failing file type extension authentication checkSame generic ecosystem
  • Newell Brands DYMO ID parent directory open to path traversal through improper spheres of controlSame generic ecosystem
  • Sssd: sssd: denial of service via out-of-bounds read in autofs responderSame generic ecosystem
  • Sssd: sssd: denial of service via out-of-bounds read during passkey parsingSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-306
Source
CVE List V5
Source checked
Oct 5, 2026
References
2 linked sources
Open source record