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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是美国Apache基金会的一款数据仓库基础架构软件。 Apache Hive 4.2.1之前版本存在服务端请求伪造漏洞，该漏洞源于Avro SerDe schema解析存在服务端请求伪造漏洞，可能导致拥有CREATE TABLE权限的认证远程攻击者使Hive服务器获取攻击者控制的URL，从而暴露云实例元数据、内部网络服务或本地服务器文件。

AI Predicted 8.1 Difficulty: Easy EPSS 1.04% · P63

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
Vulnerability Title
Apache Hive 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Hive是美国Apache基金会的一款数据仓库基础架构软件。 Apache Hive 4.2.1之前版本存在服务端请求伪造漏洞，该漏洞源于Avro SerDe schema解析存在服务端请求伪造漏洞，可能导致拥有CREATE TABLE权限的认证远程攻击者使Hive服务器获取攻击者控制的URL，从而暴露云实例元数据、内部网络服务或本地服务器文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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-2026-65637 Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix in
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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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