{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55976", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-06-17T23:57:13.013Z", "datePublished": "2026-08-25T10:13:27.529Z", "dateUpdated": "2026-08-25T10:13:27.529Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-08-25T10:13:27.529Z"}, "title": "Apache Hive: SSRF vulnerability in Hive Avro Serde due to Insufficient input validation on avro.schema.url", "problemTypes": [{"descriptions": [{"description": "CWE-918 Server-Side Request Forgery (SSRF)", "lang": "en", "cweId": "CWE-918", "type": "CWE"}]}], "source": {"defect": ["HIVE-29671"], "discovery": "EXTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Hive", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "org.apache.hive:hive-serde", "versions": [{"status": "affected", "version": "2.1.0", "lessThanOrEqual": "4.2.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"value": "Server-Side Request Forgery (SSRF) in Avro SerDe schema resolution in Apache Hive before 4.2.1 allows an authenticated remote attacker with CREATE TABLE privilege to cause the Hive server to fetch an attacker-controlled URL when resolving the avro.schema.url\u00a0table property on an Avro table that is subsequently queried. This can expose cloud instance metadata, internal network services, or local server files to the Hive process identity. Users are recommended to upgrade to version 4.2.1, which fixes this issue.\n\n\n\nAttacker access requirements:\n\n * Network access to HiveServer2 / Metastore: required (remote attacker model).\n * Valid Hive authentication: required.\n * CREATE TABLE (or equivalent) privilege: required, so the attacker can set avro.schema.url\u00a0in table properties.\n * SELECT privilege on the malicious table: not required for the creator, who can typically query their own table; any other user granted SELECT can also trigger the fetch.\n * Write access to the table LOCATION: not required; the attack uses the schema URL, not the data path.\n * Admin / superuser privileges: not required; an ordinary authenticated user with DDL rights is sufficient.\n * External tables enabled: typically required in practice, and enabled by default in most deployments.\n\n\n\n\nDetection guidance:\n\n * Inspect metastore / Hive table metadata for Avro tables whose avro.schema.url\u00a0uses unexpected schemes such as http, https, file, or ftp, or points at link-local / cloud metadata addresses (for example 169.254.169.254) or other internal hosts.\n * Review HiveServer2 and Metastore logs around CREATE/ALTER TABLE and queries against Avro tables for schema-resolution failures or outbound fetches of avro.schema.url.\n * Correlate CREATE TABLE / ALTER TABLE activity that sets avro.schema.url\u00a0with subsequent SELECT activity on the same table, especially when the URL target is unusual for schema distribution.\n * On cloud deployments, check instance / VPC flow logs and metadata service access logs for unexpected requests from Hive host identities shortly after Avro DDL or query activity.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Server-Side Request Forgery (SSRF) in Avro SerDe schema resolution in Apache Hive before 4.2.1 allows an authenticated remote attacker with CREATE TABLE privilege to cause the Hive server to fetch an attacker-controlled URL when resolving the <code>avro.schema.url</code>&nbsp;table property on an Avro table that is subsequently queried. This can expose cloud instance metadata, internal network services, or local server files to the Hive process identity. Users are recommended to upgrade to version 4.2.1, which fixes this issue.</p><p>Attacker access requirements:</p><ul><li>Network access to HiveServer2 / Metastore: required (remote attacker model).</li><li>Valid Hive authentication: required.</li><li>CREATE TABLE (or equivalent) privilege: required, so the attacker can set <code>avro.schema.url</code>&nbsp;in table properties.</li><li>SELECT privilege on the malicious table: not required for the creator, who can typically query their own table; any other user granted SELECT can also trigger the fetch.</li><li>Write access to the table LOCATION: not required; the attack uses the schema URL, not the data path.</li><li>Admin / superuser privileges: not required; an ordinary authenticated user with DDL rights is sufficient.</li><li>External tables enabled: typically required in practice, and enabled by default in most deployments.</li></ul><p>Detection guidance:</p><ul><li>Inspect metastore / Hive table metadata for Avro tables whose <code>avro.schema.url</code>&nbsp;uses unexpected schemes such as http, https, file, or ftp, or points at link-local / cloud metadata addresses (for example 169.254.169.254) or other internal hosts.</li><li>Review HiveServer2 and Metastore logs around CREATE/ALTER TABLE and queries against Avro tables for schema-resolution failures or outbound fetches of <code>avro.schema.url</code>.</li><li>Correlate CREATE TABLE / ALTER TABLE activity that sets <code>avro.schema.url</code>&nbsp;with subsequent SELECT activity on the same table, especially when the URL target is unusual for schema distribution.</li><li>On cloud deployments, check instance / VPC flow logs and metadata service access logs for unexpected requests from Hive host identities shortly after Avro DDL or query activity.</li></ul><br>"}]}], "references": [{"url": "https://github.com/apache/hive", "tags": ["product"]}, {"url": "https://issues.apache.org/jira/browse/HIVE-29671", "tags": ["issue-tracking"]}, {"url": "https://github.com/apache/hive/commit/45049202df35cea382616624de3fe8d252aa2d00", "tags": ["patch"]}, {"url": "https://lists.apache.org/thread/6d56mk501fp4f8cb5wvrpj2jwd9knt05", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "zhaokaifei", "type": "reporter"}], "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.hive:hive-serde", "product": "Apache Hive", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "4.2.0", "status": "affected", "version": "2.1.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Server-Side Request Forgery (SSRF) in Avro SerDe schema resolution in Apache Hive before 4.2.1 allows an authenticated remote attacker with CREATE TABLE privilege to cause the Hive server to fetch an attacker-controlled URL when resolving the avro.schema.url\u00a0table property on an Avro table that is subsequently queried. This can expose cloud instance metadata, internal network services, or local server files to the Hive process identity. Users are recommended to upgrade to version 4.2.1, which fixes this issue.\n\n\n\nAttacker access requirements:\n\n * Network access to HiveServer2 / Metastore: required (remote attacker model).\n * Valid Hive authentication: required.\n * CREATE TABLE (or equivalent) privilege: required, so the attacker can set avro.schema.url\u00a0in table properties.\n * SELECT privilege on the malicious table: not required for the creator, who can typically query their own table; any other user granted SELECT can also trigger the fetch.\n * Write access to the table LOCATION: not required; the attack uses the schema URL, not the data path.\n * Admin / superuser privileges: not required; an ordinary authenticated user with DDL rights is sufficient.\n * External tables enabled: typically required in practice, and enabled by default in most deployments.\n\n\n\n\nDetection guidance:\n\n * Inspect metastore / Hive table metadata for Avro tables whose avro.schema.url\u00a0uses unexpected schemes such as http, https, file, or ftp, or points at link-local / cloud metadata addresses (for example 169.254.169.254) or other internal hosts.\n * Review HiveServer2 and Metastore logs around CREATE/ALTER TABLE and queries against Avro tables for schema-resolution failures or outbound fetches of avro.schema.url.\n * Correlate CREATE TABLE / ALTER TABLE activity that sets avro.schema.url\u00a0with subsequent SELECT activity on the same table, especially when the URL target is unusual for schema distribution.\n * On cloud deployments, check instance / VPC flow logs and metadata service access logs for unexpected requests from Hive host identities shortly after Avro DDL or query activity."}], "id": "CVE-2026-55976", "lastModified": "2026-08-25T11:16:53.673", "metrics": {}, "published": "2026-08-25T11:16:53.673", "references": [{"source": "[email protected]", "url": "https://github.com/apache/hive"}, {"source": "[email protected]", "url": "https://github.com/apache/hive/commit/45049202df35cea382616624de3fe8d252aa2d00"}, {"source": "[email protected]", "url": "https://issues.apache.org/jira/browse/HIVE-29671"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread/6d56mk501fp4f8cb5wvrpj2jwd9knt05"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "[email protected]", "type": "Primary"}]}

{}

{"created": "2026-08-25T11:30:06.696296+00:00", "updated": "2026-08-25T11:30:06.696303+00:00", "vendors": []}