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CVE-2026-73137 high CVSS 7.7

Information Disclosure in Red Hat Advanced Cluster (CVE-2026-73137)

Summary

Vulnerability in Red Hat Advanced Cluster (CVE-2026-73137). Confidential information can be exposed externally. Exploitable via secretRef.Namespace.

Original description

The description as published by the source.

A flaw was found in the multicloud-operators-subscription component of Red Hat Advanced Cluster Management (RHACM). A tenant with HelmRelease create permissions can exploit this vulnerability by manipulating the secretRef.Namespace field. This allows the GetSecret() function in the HelmRelease controller to fetch sensitive credentials from any namespace, which are then sent to an attacker-controlled Helm repository. This can lead to the exfiltration of credentials from arbitrary namespace Secrets, resulting in information disclosure.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-73137 has been found in Red Hat Advanced Cluster.
Attackers can target a specific entry point like secretRef.Namespace over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Red Hat Advanced Cluster CVE-2026-73137" on the vendor's site.

CVE-2026-73137 (Red Hat Advanced Cluster) — CWE-200 / CVSS v3 7.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: secretRef.Namespace
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Information disclosure (CWE-200) exists in Red Hat Advanced Cluster. Attackers reach the vulnerable code path via secretRef.Namespace.

📍 Affected scope

Check the vendor advisory for the affected versions of Red Hat Advanced Cluster. Attack surface: secretRef.Namespace.

🔥 Severity

Severity: High (CVSS 7.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで Red Hat Advanced Cluster を使っているサービスとバージョンを洗い出す。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

References

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