How severe is CVE-2026-63747?

CVE-2026-63747 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-63747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63747?

CVE-2026-63747 affects Surrealdb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63747?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-63747 published?

CVE-2026-63747 was published on 2026-07-20 and last updated on 2026-07-23.

CVE-2026-63747

CVE-2026-63747 is a high-severity vulnerability in Surrealdb with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-248.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-248
Affected product: Surrealdb
Published: 2026-07-20
Last modified: 2026-07-23

Description

SurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unauthenticated attackers can send a malformed WebSocket message to the /rpc endpoint to crash the server process.

Frequently asked questions

What is CVE-2026-63747?: SurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unauthenticated attackers can send a malformed WebSocket message to the /rpc endpoint to crash the server process.
How severe is CVE-2026-63747?: CVE-2026-63747 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-63747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63747?: CVE-2026-63747 affects Surrealdb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63747?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-63747 published?: CVE-2026-63747 was published on 2026-07-20 and last updated on 2026-07-23.

References

Affected products (1)

cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*

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