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CVE-2026-63760 surrealdb CVE debrief

CVE-2026-63760 is a denial-of-service vulnerability in SurrealDB before version 3.1.0. The vulnerability occurs because the configured recursion depth limit is not enforced in the value and JSON parser when processing nested braces, brackets, or parentheses. This allows unauthenticated attackers to send deeply nested JSON payloads to the WebSocket /rpc endpoint, exhausting server memory and crashing the process. Users of SurrealDB versions before 3.1.0 should be aware of this vulnerability and take steps to mitigate it.

Vendor
surrealdb
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-20
Original CVE updated
2026-07-22
Advisory published
2026-07-20
Advisory updated
2026-07-22

Who should care

Users of SurrealDB versions before 3.1.0 should be aware of this vulnerability and take steps to mitigate it. This includes upgrading to version 3.1.0 or later, and monitoring for suspicious activity. Operators, platform administrators, vulnerability management teams, and security teams may be impacted by this vulnerability.

Technical summary

The vulnerability is caused by the lack of enforcement of the recursion depth limit in the JSON parser of SurrealDB before version 3.1.0. This allows attackers to send deeply nested JSON payloads that can cause a denial-of-service condition by exhausting server memory and crashing the process via the WebSocket /rpc endpoint. The vulnerability has a CVSS score of 8.7 and is considered HIGH severity.

Defensive priority

High

Recommended defensive actions

  • Upgrade to SurrealDB version 3.1.0 or later
  • Monitor for suspicious activity
  • Implement additional security measures to prevent denial-of-service attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was reported by Vulncheck and is tracked as GHSA-q729-696q-g9pq. The NVD entry for this vulnerability is currently awaiting analysis. This information is based on the CVE record and NVD details. Further verification is recommended to confirm affected scope and severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-63760 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-63760

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-63760 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-63760

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.