PT-2026-3269 · Apache Kafka+1 · Kafka Connect Bigquery Connector+1

Audrey Budryte · Published 2026-01-16 · Updated 2026-01-18 · CVE-2026-23529

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Kafka Connect BigQuery Connector versions prior to 2.11.0

Description The Kafka Connect BigQuery Connector, a sink connector from Apache Kafka to Google BigQuery, contains a flaw that could allow arbitrary file reads. This occurs because the service does not validate externally-sourced credential configurations before passing them to authentication libraries. An attacker can exploit this by providing a malicious credential configuration containing crafted credential source.file paths or credential source.url endpoints, potentially leading to arbitrary file reads or Server-Side Request Forgery (SSRF) attacks. The connector requires Google Cloud credential configurations for authentication to BigQuery services.

Recommendations Upgrade to version 2.11.0 or later.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

CWE-73

Related Identifiers

BDU:2026-02008

CVE-2026-23529

GHSA-3MG8-2G53-5GJ4

Affected Products

Google Bigquery

Kafka Connect Bigquery Connector

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23529.json · Exploit
• https://bdu.fstec.ru/vul/2026-02008 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23529 · Security Note
• https://osv.dev/vulnerability/CVE-2026-23529 · Vendor Advisory
• https://github.com/Aiven-Open/bigquery-connector-for-apache-kafka/releases/tag/v2.11.0 · Note
• https://github.com/Aiven-Open/bigquery-connector-for-apache-kafka/commit/20ea3921c6fe72d605a033c1943b20f49eaba981 · Note
• https://github.com/Aiven-Open/bigquery-connector-for-apache-kafka/security/advisories/GHSA-3mg8-2g53-5gj4 · Note
• https://docs.cloud.google.com/support/bulletins#gcp-2025-005 · Note
• https://twitter.com/pulsepatchio/status/2012894838845321234 · Twitter Post
• https://twitter.com/CVEnew/status/2012303238440304758 · Twitter Post