CVE-2026-85664: Allocation of Resources Without Limits or Throttling in chroma-core chroma
Chroma 1.5.9 fails to validate maximum bounds on HNSW index parameters max_neighbors, ef_construction, and ef_search in collection-create requests. Unauthenticated attackers can supply arbitrarily large parameter values to exhaust server memory and cause denial of service during index compaction.
CVE-2026-85664: Allocation of Resources Without Limits or Throttling in chroma-core chroma
Description
Chroma 1.5.9 fails to validate maximum bounds on HNSW index parameters max_neighbors, ef_construction, and ef_search in collection-create requests. Unauthenticated attackers can supply arbitrarily large parameter values to exhaust server memory and cause denial of service during index compaction.
CVSS v4.0
Score 8.7high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T13:32:28.993Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9adb45acd9273b49bef58b
Added to database: 09/04/2026, 14:52:53 UTC
Last updated: 09/04/2026, 23:29:08 UTC
Views: 7
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