CriticalVulnerability

CVE-2026-45829: ChromaDB pre-authentication code injection via collections endpoint

Source: NVD(opens in a new tab)
Identifier: CVE-2026-45829
Published: May 18, 2026
Record updated: October 9, 2026

Affected: chromadb >= 1.0.0, <= 1.5.9
Fixed in: No fixed version was stated when the source was last read.
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 1.0%

Summary

CVE-2026-45829 is a pre-authentication code injection flaw in version 1.0.0 or later of the ChromaDB Python project. An unauthenticated attacker can run arbitrary code on the server by sending a malicious model repository with trust_remote_code set to true to the /api/v2/tenants/{tenant}/databases/{db}/collections endpoint. HiddenLayer assigned a CVSS 4.0 score of 10.0 (Critical), and NIST had not yet provided an assessment.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: 1.0%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on October 14, 2026.
Disclosure date: May 18, 2026

Weaknesses and techniques

Weakness (CWE): CWE-94
Attack pattern (CAPEC): CAPEC-242

Affected

Packages: chromadb@>= 1.0.0, <= 1.5.9

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Framework
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-45829

First tracked: May 18, 2026 at 08:12 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

chromadbPyPILLM dependency since 2023-02-09 · 18 tracked dependents

Summary

Mitigation

Affected packages in the Exposure Registry

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