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CVE-2026-45831 Chroma CVE debrief

CVE-2026-45831 is a HIGH severity vulnerability in the ChromaDB Python Project's SimpleRBACAuthorizationProvider. The vulnerability has a CVSS score of 8.8. The SimpleRBACAuthorizationProvider authorization provider in versions 0.5.0 or later evaluates whether a user holds a given permission but never checks which tenant, database, or collection that permission applies to, allowing users to perform cross-tenant actions.

Vendor
Chroma
Product
ChromaDB
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-12
Advisory published
2026-06-12
Advisory updated
2026-06-12

Who should care

Users of ChromaDB Python Project's SimpleRBACAuthorizationProvider, particularly those using versions 0.5.0 or later, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The SimpleRBACAuthorizationProvider authorization provider in ChromaDB Python Project versions 0.5.0 or later has a vulnerability that allows users to perform cross-tenant actions. This is because the provider evaluates whether a user holds a given permission but never checks which tenant, database, or collection that permission applies to.

Defensive priority

HIGH

Recommended defensive actions

  • Update to a patched version of ChromaDB Python Project's SimpleRBACAuthorizationProvider, if available.
  • Implement additional access controls to restrict cross-tenant actions.

Evidence notes

The vulnerability was reported by Hiddenlayer.

Official resources

CVE-2026-45831 was published on 2026-06-12T16:16:28.797Z and modified on 2026-06-12T16:23:23.800Z.