A HIGH-severity vulnerability identified as CVE-2026-3259 has been published on April 23, 2026 with a CVSS base score of 7.1. This security advisory provides a detailed breakdown of the vulnerability, its potential impact, weakness classification, and actionable steps to protect your systems.
Vulnerability Details
CVE ID: CVE-2026-3259
Severity: HIGH
CVSS Score: 7.1
Published: April 23, 2026
Weakness (CWE): CWE-209
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
Technical Description
A Generation of Error Message Containing Sensitive Information vulnerability in the Materialized View Refresh mechanism in Google BigQuery on Google Cloud Platform allows an authenticated user to potentially disclose sensitive data using a crafted materialized view that triggers a runtime error during the refresh process. This vulnerability was patched on 29 January 2026, and no customer action is needed.
Potential Impact
If exploited, this high-severity vulnerability could allow an attacker to cause significant damage to affected systems. Organizations running affected software should treat this as a priority remediation item.
Recommended Action
No official patch is available yet. Until one is released:
- Monitor the official NVD page and vendor channels for patch announcements.
- Restrict access to the affected system or service where possible.
- Apply network-level mitigations such as firewall rules or WAF policies.
- Enable logging and alerting for anomalous activity related to this vulnerability.
- Review your incident response plan in case of active exploitation.
References
Related Security Advisories
- [HIGH] CVE-2026-6022 — CVSS 7.5 (April 22, 2026) — HIGH / CVSS 7.5
- [HIGH] CVE-2026-6023 — CVSS 8.1 (April 22, 2026) — HIGH / CVSS 8.1
- [HIGH] CVE-2026-40542 — CVSS 7.3 (April 22, 2026) — HIGH / CVSS 7.3
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