CVE-2026-85664 — Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion
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…
Published: 2026-09-04 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7