CVE-2026-85664: high-severity vulnerability in chroma-core chroma
Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.7%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
chroma-core · chromaRelated CVEs — chroma-core chroma
In the same product, most dangerous first.
References
https://github.com/chroma-core/chromahttps://github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/auth/mod.rshttps://github.com/chroma-core/chroma/blob/1.5.9/rust/types/src/hnsw_configuration.rshttps://github.com/chroma-core/chroma/issues/7225https://www.vulncheck.com/advisories/chroma-1.5.9-unbounded-hnsw-index-parameters-memory-exhaustion