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CVE-2026-55976— Apache Hive: SSRF vulnerability in Hive Avro Serde due to Insufficient input validation on avro.schema.url

Quick assessment

Affected
Apache Software Foundation Apache Hive
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Hive 4.2.1 版本之前的 Avro SerDe 模式解析中存在服务器端请求伪造（SSRF）漏洞。经过身份验证的远程攻击者若拥有 权限，可在 Avro 表的表属性中设置 ，并在后续查询该表时，诱导 Hive 服务器访问攻击者控制的 URL。此举可能导致 Hive 进程身份暴露云实例元数据、内部网络服务或本地服务器文件。建议用户升级至 4.2.1 版本以修复此问题。 攻击者访问要求： 对 HiveServer2 / Metastore 的网络访问：必需（适用于远程攻击模型）。 有效的 Hive 身

AI Predicted 8.1 Difficulty: Easy EPSS 0.29% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Hive 2.1.0≤ 4.2.0 affected
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I. Basic Information for CVE-2026-55976

Vulnerability Information
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Vulnerability Title
Apache Hive: SSRF vulnerability in Hive Avro Serde due to Insufficient input validation on avro.schema.url
Source: CVE Program / CVE List V5
Vulnerability Description
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 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. Attacker access requirements: * Network access to HiveServer2 / Metastore: required (remote attacker model). * Valid Hive authentication: required. * CREATE TABLE (or equivalent) privilege: required, so the attacker can set avro.schema.url in table properties. * 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. * Write access to the table LOCATION: not required; the attack uses the schema URL, not the data path. * Admin / superuser privileges: not required; an ordinary authenticated user with DDL rights is sufficient. * External tables enabled: typically required in practice, and enabled by default in most deployments. Detection guidance: * Inspect metastore / Hive table metadata for Avro tables whose avro.schema.url 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. * 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. * Correlate CREATE TABLE / ALTER TABLE activity that sets avro.schema.url with subsequent SELECT activity on the same table, especially when the URL target is unusual for schema distribution. * 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Hive 2.1.0 ~ 4.2.0 -

II. Public POCs for CVE-2026-55976

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III. Intelligence Information for CVE-2026-55976

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Patches & Fixes for CVE-2026-55976 (1)

Mailing List Discussions for CVE-2026-55976 (1)

Vendor Pages for CVE-2026-55976 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-25 · 14 CVEs total

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CVE-2026-73180 Apache Tomcat: Authenticated WebSocket session survives end of HTTP session

IV. Related Vulnerabilities

Same product: Apache Hive
Same vendor: Apache Software Foundation
Same weakness: CWE-918

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