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Advisory record · GHSA-f4j7-r4q5-qw2c

ChromaDB Python project has a pre-authentication code injection vulnerability

CVSS 10.0 CriticalCriticalEPSS 0.15 · 96th percentile

Critical, because:

  • CVSS score 10.0: 9.0 or more.
  • CVSS score 10.0 (7.0 or more) and EPSS 0.15 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the GitHub Advisory Database at 18 May 2026, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
chromadbPyPI>=1.0.0, <=1.5.9No fixed version yet
Identifiers
GHSA-f4j7-r4q5-qw2c · CVE-2026-45829 · PYSEC-2026-311
Weakness (CWE)
CWE-94 · CWE-502
Tags
Published
18 May 2026
Updated
5 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The chromadb package, versions 1.0.0 through 1.5.9, has a pre-authentication code injection flaw. An unauthenticated attacker who can reach the server can send a malicious model repository with trust_remote_code set to true to the collections API endpoint, which lets them run arbitrary code on the server. The source lists no fixed version, so no fix is available yet; limiting network access to the ChromaDB server is the main protection until one is released.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
10.0 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CNA (HiddenLayer)
  • CISA KEV Not listed.
  • EPSS 0.15, the 96th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:09 UTC First seen by agentprime
  2. 31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.