CVE-2026-8828
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 · uneditedA lack of authorization validation in version 1.0.0 or later of the ChromaDB Rust project allows any authenticated users to arbitrarily read, write, update, or delete data in any tenant's collection regardless of which tenant they belong to.
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 · high confidenceChromaDB Rust versions 1.0.0+ have a multi-tenancy authorization bypass where the system fails to validate that authenticated users are accessing only their own tenant's collections. This allows any authenticated user to read, write, update, or delete data in any tenant's collection by manipulating tenant identifiers in requests.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Authentication
- X
- User interaction
- None
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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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Identify ChromaDB Rust versionRun 'chromadb --version' or check the package version in your dependency manifest (Cargo.toml, requirements.txt, or similar). For programmatic access, import chromadb and call chromadb.__version__ or the client.get_version() API.Affected if Version is 1.0.0 or higher and multi-tenancy feature is in use
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Confirm multi-tenancy is enabledReview your ChromaDB configuration or initialization code. Check if tenants are being created via client.create_tenant(tenant_id) or if tenant_id parameters are accepted in API calls. Inspect your authentication layer to verify it issues tenant-scoped credentials.Affected if Multi-tenancy is configured and active in your environment
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Verify tenant authorization enforcementTest cross-tenant access by attempting to read, write, update, or delete a collection belonging to a different tenant while authenticated as a user in another tenant. Use API calls with manipulated tenant_id parameters. Review your authentication/authorization middleware to confirm tenant validation logic exists at each data access endpoint.Affected if Tenant isolation is not properly enforced and authenticated users can access collections outside their assigned tenant
If you are running ChromaDB Rust version 1.0.0 or higher with multi-tenancy enabled and you can access another tenant's collections by manipulating tenant identifiers in requests, you are affected by this authorization bypass.
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 dataImplement and enforce tenant-level authorization checks at every data access point to verify the requesting user belongs to the target tenant before allowing any CRUD operations.
- Consultation6.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $13,440.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-8828 — 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-2026-8828 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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- Version or environment caveats, and links to real fixes
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