CVE-2026-85664

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Source
https://cve.org/CVERecord?id=CVE-2026-85664
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85664.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85664
Published
2026-09-04T14:32:20Z
Modified
2026-10-28T02:30:54Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85664.json"
}
References

Affected packages

Git / github.com/chroma-core/chroma

Affected ranges

Type
GIT
Repo
https://github.com/chroma-core/chroma
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
a0a3c35217f2252870331dfd7b91590131fdad10
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "1.5.9"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

0.*
0.0.2
0.1.0
0.2.0
0.3.0
0.3.1
0.3.10
0.3.11
0.3.12
0.3.13
0.3.14
0.3.15
0.3.16
0.3.18
0.3.19
0.3.2
0.3.21
0.3.22
0.3.23
0.3.24
0.3.25
0.3.26
0.3.27
0.3.28
0.3.29
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.0
0.4.1
0.4.10
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8
0.4.9
js_release_1.*
js_release_1.5.7
js_release_1.5.8
js_release_1.5.9
js_release_alpha_1.*
js_release_alpha_1.5.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85664.json"