SurrealDB before v2.6.1 Denial of Service via scripting
Summary
| CVE | CVE-2026-63762 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-20 12:19:46 UTC |
| Updated | 2026-07-22 19:41:01 UTC |
| Description | SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability in its embedded JavaScript scripting engine, which is enabled via the --allow-scripting capability (disabled by default). Any user able to execute arbitrary queries — including unauthenticated guests when --allow-guests is enabled — can use built-in string functions to construct a large string and pass it to the JavaScript runtime for compilation, triggering a null pointer dereference in the underlying QuickJS-NG engine. This causes the server process to terminate immediately without graceful shutdown, requiring a manual restart. The issue was fixed by updating the rquickjs dependency from v0.9.0 to v0.11.0. |
Risk And Classification
Primary CVSS: v4.0 6 MEDIUM from [email protected]
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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: 0.002350000 probability, percentile 0.144520000 (date 2026-07-22)
Problem Types: CWE-476 | CWE-476 NULL Pointer Dereference
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 6 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
PresentPrivileges Required
LowUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:L/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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Surrealdb | Surrealdb | All | All | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha1 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha10 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha11 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha12 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha13 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha14 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha16 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha17 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha18 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha2 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha3 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha4 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha5 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha6 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha7 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha8 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | alpha9 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | beta1 | All | All |
| Application | Surrealdb | Surrealdb | 3.0.0 | beta2 | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/surrealdb/surrealdb/security/advisories/GHSA-xx7m-69ff-9crp | [email protected] | github.com | Mitigation, Vendor Advisory |
| www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-scripting | [email protected] | www.vulncheck.com | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: LucyEgan (en)
There are currently no legacy QID mappings associated with this CVE.