SurrealDB: Crafting malicious LIVE queries writes to the database, resulting in DoS, without permission to the table required

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2026-63754: 0.45% estimated exploitation activity in the next 30 days; percentile 39.19 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

A `LIVE` query whose `WHERE` clause evaluates to an error caused the source data modifier (the user creating, updating, or deleting a record on the watched table) to fail instead. Calling any arbitrary SurrealQL function with a typed parameter and passing a value of the wrong type — for example `LIVE SELECT * FROM t WHERE string::trim(deny)` — triggered an evaluation error inside the LIVE notification path. That error then propagated through to the triggering write, rolling back the attempted change. While such a `LIVE` query was registered, all `CREATE`, `UPDATE`, and `DELETE` operations on the watched table failed — including those issued by a root user — for as long as the registration remained active. Registering the `LIVE` required `select` permission on the table; no other permission on the table was needed.

Impact An authenticated user with `select` permission on a table can prevent all `CREATE`, `UPDATE`, and `DELETE` operations on that table — by any other user, up to…

Published by the source

1 Jul 2026, 20:13 UTC

Last modified by the source

4 Nov 2026, 02:56 UTC

Source last checked

4 Nov 2026, 06:30 UTC

1. Revision 2 · amended · 4 Nov 2026

   Amended from osv record GHSA-4v76-cw68-4vc9

2. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-4v76-cw68-4vc9

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# Patch Next advisory brief: CVE-2026-63754

Advisory: SurrealDB: Crafting malicious LIVE queries writes to the database, resulting in DoS, without permission to the table required
IDs: CVE-2026-63754, GHSA-4v76-cw68-4vc9
Record: https://patchnext.com/advisories/ghsa-4v76-cw68-4vc9 (revision 2, source checked 4 Nov 2026, 06:30 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: surrealdb 3.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io surrealdb: affected < 3.1.0; fixed in 3.1.0

## Suggested inspection (read-only)
- crates.io surrealdb: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on surrealdb.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-4v76-cw68-4vc9 (GitHub-reviewed advisory GHSA-4v76-cw68-4vc9 lists affected ranges: crates.io surrealdb >=0 <3.1.0)
- Verified: https://osv.dev/vulnerability/GHSA-4v76-cw68-4vc9 (OSV record GHSA-4v76-cw68-4vc9 lists affected ranges: crates.io surrealdb >=0 <3.1.0 (fixed))

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