CVE-2025-71391 SurrealDB before 2.2.2 Denial of Service via /sql endpoint

What is CVE-2025-71391?

CVE-2025-71391 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 an uncaught exception vulnerability in the net module that allows authenticated users to crash the database. Attackers can send crafted HTTP queries containing null bytes to the /sql endpoint, causing an unhandled exception that crashes the SurrealDB instance and any dependent applications.

Weakness: CWE-248

Which versions are affected by CVE-2025-71391?

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

Products include Surrealdb Surrealdb.

How do I fix CVE-2025-71391?

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-2025-71391 being exploited?

There is no known exploitation of CVE-2025-71391 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-rq86-9m6r-cm3g, GHSA-x3fg-mm84-q54h.