CVE-2026-63762Network attack vector

Server crash via oversized JavaScript compilation

Published Jul 20, 2026 · Updated Jul 20, 2026

Denial of service in SurrealDB before 2.6.1 and before 3.0.0-beta.3 allows remote authenticated users to crash the server via queries. Built-in string functions construct an oversized string that QuickJS-NG compiles through the embedded JavaScript runtime, triggering a null pointer dereference. Reachability requires scripting and arbitrary-query access; enabled guest access also permits remote unauthenticated exploitation, and the process remains down until manually restarted.

CVSS severity6.0
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in SurrealDB before 2.6.1 and before 3.0.0-beta.3 allows remote authenticated users to crash the server via queries. Built-in string functions construct an oversized string that QuickJS-NG compiles through the embedded JavaScript runtime, triggering a null pointer dereference. Reachability requires scripting and arbitrary-query access; enabled guest access also permits remote unauthenticated exploitation, and the process remains down until manually restarted.

The record

CVE
CVE-2026-63762
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
SurrealDB
Product
SurrealDB
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.6.1
  2. Affected versionversion=0 <3.0.0-beta.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SurrealDB · SurrealDBversion=0 <2.6.1; version=0 <3.0.0-beta.3

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.0SurrealDBCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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