CVE-2026-33109
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code over a network.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · low confidenceThis is an improper access control vulnerability in Azure Managed Instance for Apache Cassandra. The flaw allows an authorized attacker (someone with existing access credentials) to execute arbitrary code over the network, potentially leading to full system compromise. The critical severity (CVSS 9.9) indicates the vulnerability is easily exploitable and has severe impact.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm use of Azure Managed Instance for Apache CassandraReview your Azure subscription resources using Azure Portal, CLI ('az resource list'), or infrastructure-as-code definitions to identify any deployed Managed Instance for Apache Cassandra resources.Affected if Any Azure Managed Instance for Apache Cassandra resource exists in your subscription.
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Identify network exposure of the managed instanceCheck the network configuration of the Cassandra instance: review NSG rules, firewall settings, and public IP assignment using Azure Portal or 'az network nic show' commands. Determine if the management or client ports are accessible from the internet or untrusted networks.Affected if The instance has public IP exposure or overly permissive inbound rules allowing unauthorized network access.
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Audit access credentials and identity permissionsReview who has credentials, keys, or role assignments for the Managed Instance for Apache Cassandra. Use Azure AD portal or 'az role assignment list --scope <resource-id>' to list principals with access. Check for overprivileged users or service principals.Affected if Multiple or overly broad identities have access credentials, or the principle of least privilege is not enforced.
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Review recent authentication and activity logsExamine Azure Activity Log and Azure Managed Cassandra diagnostic logs for unusual authentication events, especially successful logins from unexpected IP addresses or at unusual times. Use Log Analytics or 'az monitor activity-log' queries.Affected if There are anomalous authentication events or unexpected user activity that suggests credential misuse.
If your environment contains any Azure Managed Instance for Apache Cassandra resources, you are affected by this vulnerability since all versions are impacted; focus detection on monitoring for signs of unauthorized access or exploitation.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply any Azure-provided security patches or updates for Managed Instance for Apache Cassandra immediately. If no patch is available, contact Azure support for remediation guidance and consider network segmentation as a compensating control until a fix is deployed.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-33109 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-33109 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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