CVE-2025-71395 surrealdb CVE debrief

Who should care

Users of SurrealDB versions before 2.2.2, particularly database administrators, security teams, and operators responsible for maintaining and securing SurrealDB instances, should apply the patch to prevent potential denial of service attacks. This involves assessing their current version, understanding the vulnerability's impact, and taking immediate action to upgrade to version 2.2.2 or later. Additionally, they should review access controls, monitor for suspicious query patterns, and ensure incident response plans are in place.

Technical summary

The vulnerability in SurrealDB versions before 2.2.2 is caused by the string::replace function failing to restrict resulting string length when using regex patterns. This allows an authenticated attacker to craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service. The issue arises from the function's inability to limit the length of the resulting string, which can lead to significant memory consumption and potential system instability. Users should be aware of the potential impact on their systems, especially in environments where SurrealDB is used extensively or exposed to untrusted users.

Defensive priority

High, immediate attention recommended due to potential for denial of service attacks through crafted queries. Monitor for suspicious query patterns and restrict access to only trusted users until patched. Consider compensating controls for exposed systems while remediation is scheduled and verified. Track exceptions and retest remediated assets to ensure vulnerability is fully addressed. Review relevant monitoring, detection, and logs for exposed assets that need extra review. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Check for evidence of exploitation in logs and consider additional security measures if necessary. Ensure incident response plan is in place in case of successful exploitation. Consider asset inventory review to identify potentially vulnerable systems. Implement rollback/change windows for updates and track changes for verification. Utilize source tracking for affected systems and monitor for new information from the vendor. Review CVE and NVD details for further guidance on affected scope and severity. This prioritization is based on the high CVSS score of 7.1 and the potential for significant operational impact through denial of service attacks. The priority level may need adjustment based on specific organizational risk tolerance and asset criticality. It is crucial to verify the effectiveness of implemented defenses and continuously monitor for potential threats. The defensive priority is also influenced by the fact that the vulnerability requires an authenticated attacker, which may slightly mitigate the immediate risk but still necessitates prompt action due to the high severity of potential impacts. The overall context suggests that while immediate action is necessary, it should be balanced with thorough testing and validation to ensure that fixes do not introduce new vulnerabilities or operational issues. Therefore, a comprehensive and well-coordinated defensive strategy is essential to address this vulnerability effectively and minimize potential disruptions to critical

Recommended defensive actions

• Apply the patch to upgrade SurrealDB to version 2.2.2 or later
• Restrict access to the SurrealDB instance to only trusted users
• Monitor SurrealDB instance for potential denial of service attacks
• Review relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions and retest remediated assets to ensure vulnerability is fully addressed
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record was published on 2026-07-18T14:17:10.963Z and has not been modified since then. The NVD entry is currently Received. The vulnerability affects SurrealDB versions before 2.2.2. Evidence is limited to CVE and NVD details.

Official resources