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SurrealdbApplication

CVE-2026-63762

MEDIUM · 6.5 CVSS v3.1 Developing Published 2026-07-20
Fix available
A fix is available. Upgrade to 2.6.1 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click 4 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability in its embedded JavaScript scripting engine, which is enabled via the --allow-scripting capability (disabled by default). Any user able to execute arbitrary queries — including unauthenticated guests when --allow-guests is enabled — can use built-in string functions to construct a large string and pass it to the JavaScript runtime for compilation, triggering a null pointer dereference in the underlying QuickJS-NG engine. This causes the server process to terminate immediately without graceful shutdown, requiring a manual restart. The issue was fixed by updating the rquickjs dependency from v0.9.0 to v0.11.0.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-08-03.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
SurrealdbApplication
Affected:< 2.6.1= 3.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.6.1 or later
Fixed in 2.6.1
Recommended fix High confidence

Surrealdb v2.6.1 (or v3.0.0-beta.3/3.0.0 for 3.x branch)

  1. 1. Back up your current SurrealDB database and configuration
  2. 2. Identify your current SurrealDB version using `surreal --version`
  3. 3. If running version < 2.6.1 on the 2.x branch, upgrade to version 2.6.1 or later
  4. 4. If running version 3.0.0 (or any version < 3.0.0-beta.3) on the 3.x branch, upgrade to version 3.0.0-beta.3 or later, or the stable 3.0.0 release
  5. 5. If the --allow-scripting capability was intentionally enabled, verify scripting functionality works after upgrade
  6. 6. Restart the SurrealDB service
Caveat Review release notes for v2.6.1 and v3.0.0 for any changes to scripting behavior or other breaking changes; v3.0.0 is a major version with potential API changes

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,850. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-63762 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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