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CVE-2026-92287

Status: Awaiting AnalysisUnscored—
Severity—Unscored
Exploitation probability0.22 %higher than 11% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Pass-through of unvalidated KMS URLs to KMS clients in Apache C++ Parquet and PyArrow versions 4.0.0 to 25.0.1.

This affects users who read Parquet files and configure Parquet decryption properties with a KmsClient implementation.

On the reader side, the KMS URL can be application-controlled (specified in the KmsConnectionConfig) or file-controlled. If the user does not leverage application control for this parameter, a file-controlled KMS URL is forwarded to a pluggable KmsClient implementation. If the KMS implementation does not perform host validation and makes use of the provided KMS URL, a KMS token can be sent to a malicious host set by an attacker in the file.

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Users are recommended to upgrade to version 26.0.0, which disables this behavior by default and requires that users opt-in to it by enabling the read_kms_url flag in the DecryptionConfiguration. Users of affected versions are recommended to either specify the KMS URL in the KmsConnectionConfig when reading files, or ensure any KmsClient implementations validate received KMS URLs. Users that opt-in to file-controlled KMS URLs in version 26.0.0 and later must ensure KmsClients validate KMS URLs.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.22 %
Percentile among all scored CVEs
11
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Apache — ArrowAIApache — PyarrowAI

CWEs

References

Show 3 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-92287",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Arrow C++",
          "versions": [
            {
              "status": "affected",
              "version": "4.0.0",
              "lessThan": "26.0.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "26.0.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Apache Software Foundation",
          "product": "PyArrow",
          "versions": [
            {
              "status": "affected",
              "version": "8.0.0",
              "lessThan": "26.0.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "26.0.0",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:pypi/pyarrow",
          "packageName": "pyarrow",
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-20T09:17:12.063",
  "references": [
    {
      "url": "https://github.com/apache/arrow/issues/51349",
      "source": "security@apache.org"
    },
    {
      "url": "https://lists.apache.org/thread/0t6vry0msbk9dpsd0xv395ov5b84hj57",
      "source": "security@apache.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/10/19/6",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@apache.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Pass-through of unvalidated KMS URLs to KMS clients in Apache C++ Parquet and PyArrow versions 4.0.0 to 25.0.1.\n\n\n\n\nThis affects users who read Parquet files and configure Parquet decryption properties with a KmsClient implementation.\n\n\n\n\nOn the reader side, the KMS URL can be application-controlled (specified in the KmsConnectionConfig) or file-controlled.\nIf the user does not leverage application control for this parameter, a file-controlled KMS URL is forwarded to a pluggable KmsClient implementation. \nIf the KMS implementation does not perform host validation and makes use of the provided KMS URL, a KMS token can be sent to a malicious host set by an attacker in the file. \n\n\n\n\nUsers are recommended to upgrade to version 26.0.0, which disables this behavior by default and requires that users opt-in to it by enabling the read_kms_url flag in the DecryptionConfiguration. Users of affected versions are recommended to either specify the KMS URL in the KmsConnectionConfig when reading files, or ensure any KmsClient implementations validate received KMS URLs. Users that opt-in to file-controlled KMS URLs in version 26.0.0 and later must ensure KmsClients validate KMS URLs."
    }
  ],
  "lastModified": "2026-10-20T19:35:38.940",
  "sourceIdentifier": "security@apache.org"
}