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    2 vulnerabilities by chroma-core

    CVE-2026-85664 (GCVE-0-2026-85664)

    Vulnerability from nvd – Published: 2026-09-04 14:32 – Updated: 2026-09-04 14:32
    VLAI
    Title
    Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion
    Summary
    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.
    Severity
    8.7 (High)
    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
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    chroma-core chroma Affected: 0 , ≤ 1.5.9 (semver)
    		Create a notification for this product.
    Date Public
    2026-06-09 00:00
    Credits
    George Chen
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:pypi/chromadb",
          "product": "chroma",
          "vendor": "chroma-core",
          "versions": [
            {
              "lessThanOrEqual": "1.5.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-06-09T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T14:32:20.917Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #7225",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/chroma-core/chroma/issues/7225"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/chroma-core/chroma"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/chroma-core/chroma/blob/1.5.9/rust/types/src/hnsw_configuration.rs"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/auth/mod.rs"
        },
        {
          "name": "VulnCheck Advisory: Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/chroma-1.5.9-unbounded-hnsw-index-parameters-memory-exhaustion"
        }
      ],
      "title": "Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-85664",
    "datePublished": "2026-09-04T14:32:20.917Z",
    "dateReserved": "2026-09-04T13:32:28.993Z",
    "dateUpdated": "2026-09-04T14:32:20.917Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

    CVE-2026-85664 (GCVE-0-2026-85664)

    Vulnerability from cvelistv5 – Published: 2026-09-04 14:32 – Updated: 2026-09-04 14:32
    VLAI
    Title
    Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion
    Summary
    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.
    Severity
    8.7 (High)
    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
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    chroma-core chroma Affected: 0 , ≤ 1.5.9 (semver)
    		Create a notification for this product.
    Date Public
    2026-06-09 00:00
    Credits
    George Chen
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:pypi/chromadb",
          "product": "chroma",
          "vendor": "chroma-core",
          "versions": [
            {
              "lessThanOrEqual": "1.5.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-06-09T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T14:32:20.917Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #7225",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/chroma-core/chroma/issues/7225"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/chroma-core/chroma"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/chroma-core/chroma/blob/1.5.9/rust/types/src/hnsw_configuration.rs"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/chroma-core/chroma/blob/1.5.9/rust/frontend/src/auth/mod.rs"
        },
        {
          "name": "VulnCheck Advisory: Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/chroma-1.5.9-unbounded-hnsw-index-parameters-memory-exhaustion"
        }
      ],
      "title": "Chroma 1.5.9 Unbounded HNSW Index Parameters Memory Exhaustion",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-09-04T13:32:28.993Z",
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}