CVE-2026-63760Network attack vector

Unauthenticated server crash via nested JSON

Published Jul 20, 2026 · Updated Jul 20, 2026

Uncontrolled recursion in SurrealDB before 3.1.0 allows remote attackers to crash the database server through WebSocket /rpc payloads. The parse_value and parse_json paths accept nested braces, brackets, and parentheses without applying the configured recursion-depth limit. No credentials or query privileges are required; one deeply nested JSON message can exhaust server memory and terminate the process.

CVSS severity8.7
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in SurrealDB before 3.1.0 allows remote attackers to crash the database server through WebSocket /rpc payloads. The parse_value and parse_json paths accept nested braces, brackets, and parentheses without applying the configured recursion-depth limit. No credentials or query privileges are required; one deeply nested JSON message can exhaust server memory and terminate the process.

The record

CVE
CVE-2026-63760
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
SurrealDB
Product
SurrealDB
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

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 <3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SurrealDB · SurrealDBversion=0 <3.1.0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Application or System Exploitation Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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