Cyber Resilience

CVE-2026-63747

Surrealdb ≤ 3.1.0

Public PoC
Published
20 July 2026
Modified
23 July 2026
Patch / advisory
View advisory
CVSS Score v4 8.7
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0036 29th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-63747 is a high-severity Uncaught Exception (CWE-248) vulnerability in Surrealdb Surrealdb. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 29th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A10:2025 Mishandling of Exceptional Conditions

EU & UK References

Vulnerability Data

SurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unauthenticated attackers can send a malformed WebSocket message to the /rpc endpoint to crash the server…

more

process.

CWE(s)
CWE-248

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Malformed WebSocket message to /rpc triggers application panic (CWE-248), directly enabling Endpoint DoS via software exploitation.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-63750Same product: Surrealdb Surrealdb
CVE-2026-63762Same product: Surrealdb Surrealdb
CVE-2026-63754Same product: Surrealdb Surrealdb
CVE-2026-63759Same product: Surrealdb Surrealdb
CVE-2026-63737Same product: Surrealdb Surrealdb
CVE-2026-63760Same product: Surrealdb Surrealdb
CVE-2026-63734Same product: Surrealdb Surrealdb
CVE-2026-63736Same product: Surrealdb Surrealdb
CVE-2026-63733Same product: Surrealdb Surrealdb
CVE-2026-63748Same product: Surrealdb Surrealdb

Affected Assets

surrealdb
surrealdb
≤ 3.1.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SI-10 Information Input Validation
  • AC-3 Access Enforcement
  • SC-7 Boundary Protection
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly enforces validation of RPC/WebSocket messages to reject malformed 'use' commands that lack a namespace before they reach the handler.

AC-3 Access Enforcement good match
prevent

Requires successful authentication and authorization before any RPC handler (including /rpc) can process unauthenticated WebSocket messages.

SC-7 Boundary Protection partial match
prevent

Boundary protection can restrict or filter traffic to the /rpc WebSocket endpoint, limiting exposure to unauthenticated malformed requests.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices explicitly require structured exception handling to prevent uncaught exceptions from reaching production.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing can detect uncaught exceptions before production deployment.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes exception-handling standards that reduce uncaught exceptions.

A.8.26 Application security requirements partial match
prevents

Application security requirements typically mandate robust error and exception handling.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles call for centralized, comprehensive exception management.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require catching and handling exceptions to prevent crashes or leaks.

References