What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-18 · updated 2026-10-29
• Weakness: CWE-789

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.

Affected products

• surrealdb: before 2.0.5; from 2.1.0 before 2.1.5; from 2.2.0 before 2.2.2 — fixed in 2.0.5, 2.1.5, 2.2.2
• surrealdb: from 2.2.0 before 2.2.2 — fixed in 2.2.2

How to fix

Upgrade to a fixed version: surrealdb 2.0.5, 2.1.5, 2.2.2; surrealdb 2.2.2. Check the vendor advisory for mitigations.

References

• https://github.com/surrealdb/surrealdb/security/advisories/GHSA-3633-g6mg-p6qq
• https://www.vulncheck.com/advisories/surrealdb-before-memory-exhaustion-via-string-replace

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