How severe is CVE-2026-63757?

CVE-2026-63757 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-63757 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-2026-63757?

CVE-2026-63757 affects Surrealdb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63757?

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-2026-63757 published?

CVE-2026-63757 was published on 2026-07-20 and last updated on 2026-07-22.

CVE-2026-63757

CVE-2026-63757 is a high-severity vulnerability in Surrealdb with a CVSS 3.x base score of 8.8. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Surrealdb
Published: 2026-07-20
Last modified: 2026-07-22

Description

SurrealDB versions before 3.1.0 contain a session hijacking vulnerability where the HTTP /rpc sessions method returns attached session UUIDs without authentication and accepts arbitrary session fields with no ownership verification. Unauthenticated attackers can enumerate session UUIDs and impersonate authenticated sessions to read, write, delete data and escalate privileges.

Frequently asked questions

What is CVE-2026-63757?: SurrealDB versions before 3.1.0 contain a session hijacking vulnerability where the HTTP /rpc sessions method returns attached session UUIDs without authentication and accepts arbitrary session fields with no ownership verification. Unauthenticated attackers can enumerate session UUIDs and impersonate authenticated sessions to read, write, delete data and escalate privileges.
How severe is CVE-2026-63757?: CVE-2026-63757 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-63757 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-2026-63757?: CVE-2026-63757 affects Surrealdb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63757?: 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-2026-63757 published?: CVE-2026-63757 was published on 2026-07-20 and last updated on 2026-07-22.

References

Affected products (1)

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

More vulnerabilities in Surrealdb

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CVE-2024-58366 — High (CVSS 8.5): SurrealDB before 1.1.1 contains a format string vulnerability in the rquickjs Exception::throw_type function when…
CVE-2026-63756 — High (CVSS 8.1): SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP /rpc endpoint that…

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Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

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