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    CVE-2026-63737

    SurrealDB versions before 3.1.5 contain a denial of service vulnerability where authenticated users can crash the server with queries containing long chains of operators. Attackers can submit queries with tens of thousands of chained operators that create unbounded expression trees, causing stack overflow during query processing and aborting the entire process.

    Published:Jul 20, 2026
    Last Modified:Jul 28, 2026
    EPS:Jul 20, 2026
    EPSS Score:0.00346
    CVSS Score:6.5

    Affected Products

    Vendor
    Surrealdb
    Product
    Surrealdb

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-674 Uncontrolled Recursion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads

    Related CVEs

    CVE-2026-63763 (CVSS 7.5) — SurrealDB before 2.5.0 and before 3.0.0-beta.3 contains a confused deputy privilege escalation vulnerability. …
    CVE-2026-63762 (CVSS 6) — SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability in its embedded …
    CVE-2026-63761 (CVSS 5.3) — SurrealDB before 3.1.0 silently substitutes the ES384 algorithm when a JWT access method is configured with AL…
    CVE-2026-63760 (CVSS 8.7) — SurrealDB before 3.1.0 fails to enforce the configured recursion depth limit in the value and JSON parser when…
    CVE-2026-63759 (CVSS 7.1) — SurrealDB before 3.1.0 fails to enforce recursion depth limits in the type/kind parser when processing nested …
    CVE-2026-63758 (CVSS 5.3) — SurrealDB versions before 3.1.0 contain an authorization bypass vulnerability in the KILL statement that allow…
    CVE-2026-63757 (CVSS 8.7) — SurrealDB versions before 3.1.0 contain a session hijacking vulnerability where the HTTP /rpc sessions method …
    CVE-2026-63756 (CVSS 9.2) — SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP /rpc endpoint t…
    CVE-2026-63755 (CVSS 7.1) — SurrealDB before 3.1.0 evaluates user-supplied WHERE clauses in SELECT statements (and SET/MERGE/CONTENT/PATCH…
    CVE-2026-63754 (CVSS 7.1) — SurrealDB versions before 3.1.0 contain a denial of service vulnerability where malicious LIVE queries with WH…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High