CVE-2026-85664

    Dashboard / Vulnerabilities / CVE-2026-85664

    CVE-2026-85664

    Published: 4 Sept 2026Last Modified: 12 Sept 2026

    Summary: Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85664.json, https://nvd.nist.gov/vuln/detail/CVE-2026-85664, https://www.vulncheck.com/advisories/chroma-1.5.9-unbounded-hnsw-index-parameters-memory-exhaustion, https://github.com/chroma-core/chroma/issues/7225, 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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    js_release_1.5.9
    js_release_1.5.8
    js_release_1.5.7

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-85664 | CVE-DB