CVE-2026-33844
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 · moderate confidenceImproper access control in Azure Managed Instance for Apache Cassandra enables an authorized attacker to execute arbitrary code over the network. This access control failure allows a user with valid credentials to perform operations beyond their intended permissions, leading to remote code execution capability.
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
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 Azure Managed Instance for Apache Cassandra is deployedIn Azure Portal, search for 'Azure Managed Instance for Apache Cassandra' or use Azure Resource Graph to query for resources of type 'Microsoft.DocumentDB/cassandraClusters' or check subscription resources for Managed Cassandra instancesAffected if Any Azure Managed Instance for Apache Cassandra resource exists in the subscription
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Review role-based access control (RBAC) assignments on the Managed Cassandra resourceNavigate to the Managed Instance resource in Azure Portal, go to 'Access control (IAM)' blade, and review all role assignments. Check for users or service principals with elevated permissions beyond what their role requires, particularly those with Contributor or Owner roles that could perform operations outside their intended scopeAffected if Users or service principals have overly permissive RBAC roles (Contributor, Owner) or unexpected role assignments that could be exploited for unauthorized operations
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Verify network exposure and public network access settingsIn Azure Portal, go to the Managed Instance resource, navigate to 'Networking' or 'Firewalls and virtual networks' settings. Check if public network access is enabled and review IP firewall rules or virtual network configurationAffected if Public network access is enabled or the instance is exposed to broader network ranges than necessary for business operations
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Check for Azure Activity Log auditing of cluster operationsIn Azure Portal, go to 'Monitor' > 'Activity Log' for the Managed Cassandra resource. Look for recent operations and verify that logging is enabled. Check if audit logs show unexpected or unauthorized operation executionsAffected if Activity Log shows operations executed that exceed the expected permissions of the executing identity, indicating the access control flaw is being exploited
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Review Datacenter-level role assignments and permissionsIn the Managed Instance resource, navigate to the datacenter nodes if accessible. Check if there are custom roles or permission configurations at the datacenter level that grant more access than intended at the node levelAffected if Datacenter or node-level permissions grant broader access than expected for the assigned roles
A user is affected if they have any Azure Managed Instance for Apache Cassandra deployed, regardless of version, and especially if RBAC is overly permissive or network exposure is not restricted.
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 dataMonitor Azure security advisories for vendor patches; in the interim, apply network segmentation, review role-based access control (RBAC) assignments, enable auditing, and restrict network exposure to minimum necessary endpoints.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-33844 — 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-2026-33844 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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