CVE-2026-23529 Arbitrary File Read in Google BigQuery Sink connector
Attackers can read arbitrary files or perform SSRF by supplying malicious credential configurations to the Kafka BigQuery sink connector.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23529?
CVE-2026-23529 is a high-severity server-side request forgery vulnerability in Aiven-Open bigquery-connector-for-apache-kafka, published on 16 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-23529?
How do I fix CVE-2026-23529?
No fix has been published for CVE-2026-23529 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-23529 being exploited?
There is no known exploitation of CVE-2026-23529 in the wild and no public exploit code.
Sources
Also known as GHSA-3mg8-2g53-5gj4.