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CVE-2026-23529— Arbitrary File Read in Google BigQuery Sink connector

Quick assessment

Affected
Aiven-Open bigquery-connector-for-apache-kafka
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kafka Connect BigQuery Connector是Aiven Open开源的一个高性能数据同步中间件。 Kafka Connect BigQuery Connector 2.11.0之前版本存在代码问题漏洞，该漏洞源于服务在将外部来源的凭据配置传递给身份验证库之前未对其进行验证，可能导致任意文件读取或服务端请求伪造攻击。

CVSS 7.7 · High EPSS 0.41% · P33
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I. Basic Information for CVE-2026-23529

Vulnerability Information
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Vulnerability Title
Arbitrary File Read in Google BigQuery Sink connector
Source: CVE Program / CVE List V5
Vulnerability Description
Kafka Connect BigQuery Connector is an implementation of a sink connector from Apache Kafka to Google BigQuery. Prior to 2.11.0, there is an arbitrary file read in Google BigQuery Sink connector. Aiven's Google BigQuery Kafka Connect Sink connector requires Google Cloud credential configurations for authentication to BigQuery services. During connector configuration, users can supply credential JSON files that are processed by Google authentication libraries. The service fails to validate externally-sourced credential configurations before passing them to the authentication libraries. An attacker can exploit this by providing a malicious credential configuration containing crafted credential_source.file paths or credential_source.url endpoints, resulting in arbitrary file reads or SSRF attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Kafka Connect BigQuery Connector 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kafka Connect BigQuery Connector是Aiven Open开源的一个高性能数据同步中间件。 Kafka Connect BigQuery Connector 2.11.0之前版本存在代码问题漏洞，该漏洞源于服务在将外部来源的凭据配置传递给身份验证库之前未对其进行验证，可能导致任意文件读取或服务端请求伪造攻击。
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
Aiven-Open bigquery-connector-for-apache-kafka < 2.11.0 -

II. Public POCs for CVE-2026-23529

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10301 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-23529

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Vendor Advisories for CVE-2026-23529 (1)

Other References for CVE-2026-23529 (1)

IV. Related Vulnerabilities

Same vendor: Aiven-Open
Same weakness: CWE-73

V. Comments for CVE-2026-23529

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