CVE-2026-121423

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    CVE-2026-121423

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: SurrealDB before 3.3.0 DoS via Unbounded Recursion in val::Value Serialization

    Details: SurrealDB before 3.3.0 contains an unbounded recursion vulnerability that allows authenticated users to abort the surreald process by triggering stack overflow on deeply nested values. Attackers can repeatedly run UPDATE statements wrapping a stored array in itself, then SELECT or EXPORT it, causing persistent denial of service for all tenants.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121423.json, https://github.com/surrealdb/surrealdb/security/advisories/GHSA-rpmq-gq3f-h6jg, https://nvd.nist.gov/vuln/detail/CVE-2026-121423, https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-dos-via-unbounded-recursion-in-val-value-serialization

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -238bfeb11f5725bebed370167656748df8067595

    Affected versions

    v3.3.0-beta.4

    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
    CVE-2026-121423 | CVE-DB