CVE-2025-71395 SurrealDB before 2.2.2 Memory Exhaustion via string::replace

What is CVE-2025-71395?

CVE-2025-71395 is a high-severity denial of service vulnerability in Surrealdb Surrealdb, published on 18 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.

Weakness: CWE-789

Which versions are affected by CVE-2025-71395?

6 open source packages ship an affected version, including surrealdb. It affects 1 product.

Products include Surrealdb Surrealdb.

How do I fix CVE-2025-71395?

Upgrade surrealdb to a fixed version for your release line: 2.0.5, 2.1.5 or 2.2.2.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-71395 being exploited?

There is no known exploitation of CVE-2025-71395 in the wild and no public exploit code.

Other vulnerabilities in Surrealdb Surrealdb

• CVE-2025-71392 SurrealDB before 2.2.2 SurrealQL Injection via export Critical 9.4
• CVE-2026-63756 SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition Critical 9.2
• CVE-2026-63747 SurrealDB before 3.1.0 Denial of Service via malformed RPC use High 8.7
• CVE-2026-63757 SurrealDB before 3.1.0 Session Hijacking via /rpc sessions High 8.7
• CVE-2026-63760 SurrealDB before 3.1.0 Denial of Service via JSON Parser High 8.7

All Surrealdb Surrealdb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-3633-g6mg-p6qq, GHSA-849x-5qr7-wxfm.