CVE-2026-85664

Impact

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.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://github.com/chroma-core/chroma
• https://github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/auth/mod.rs
• https://github.com/chroma-core/chroma/blob/1.5.9/rust/types/src/hnsw_configuration.rs
• https://github.com/chroma-core/chroma/issues/7225
• https://www.vulncheck.com/advisories/chroma-1.5.9-unbounded-hnsw-index-parameters-memory-exhaustion