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NVD / CVE Program· CNA VulnCheck

CVE-2026-63762: SurrealDB before v2.6.1 Denial of Service via scripting

MediumCVSS 6.0 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: surrealdb surrealdb 2.6.1, 3.0.0-beta.3.

Low priority for now. Upgrade to surrealdb surrealdb 2.6.1, 3.0.0-beta.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Jul 20, 2026
Updated
Oct 8, 2026
EPSS
0.4% · 39th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
6.0
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-63762

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
surrealdbsurrealdb

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • surrealdb surrealdb

    • 2.6.1, 3.0.0-beta.3not affected
    • before 2.6.1affected · semver
    • before 3.0.0-beta.3affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • surrealdb surrealdbbefore 2.6.1
  • surrealdb surrealdb3.0.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
crates.iosurrealdbfrom 3.0.0-alpha.8 · before 3.0.0-beta.33.0.0-beta.3
crates.iosurrealdbbefore 2.6.12.6.1

Same product

surrealdb: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-71392SurrealDB before 2.2.2 SurrealQL Injection via export
    37Monitor
  • CVE-2026-63756SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
    36Monitor
  • CVE-2024-58366SurrealDB before 1.1.1 Format String via Scripting Functions
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-63759Jul 20, 2026 · SurrealDB before 3.1.0 Denial of Service nested type annotations
    28Monitor
  • ← EarlierCVE-2026-63760Jul 20, 2026 · SurrealDB before 3.1.0 Denial of Service via JSON Parser
    34Monitor
  • Later →CVE-2026-63763Jul 20, 2026 · SurrealDB before 2.5.0 Privilege Escalation via Future Fields
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
surrealdb surrealdb2.6.1Vendor (CNA)
surrealdb surrealdb3.0.0-beta.3Vendor (CNA)
crates.io:surrealdb2.6.1Package registry (OSV)
crates.io:surrealdb3.0.0-beta.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-637350 days apartSurrealDB before 3.2.0 Authentication Bypass via Custom API
    34Monitor
  • CVE-2026-637570 days apartSurrealDB before 3.1.0 Session Hijacking via /rpc sessions
    34Monitor
  • CVE-2026-637410 days apartSurrealDB before 3.1.0 Authentication Bypass via USE statement
    27Monitor
  • CVE-2026-637490 days apartSurrealDB before 3.1.0 Authentication Bypass via LIVE SELECT
    21Monitor

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records