SurrealDB: LIVE query subscriptions survive session state changes, bypassing access controls

Exploitation

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

CVSS

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

EPSS

• CVE-2026-63753: 0.35% estimated exploitation activity in the next 30 days; percentile 28.65 (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 SELECT` subscription records the user's auth state (`$auth`, `$token`, `$session`, `$access`) when it is registered, and the server uses that recorded state to evaluate the table- and row-level `PERMISSIONS` clauses for every subsequent notification. The recorded state is never refreshed. When something changes the user's effective auth state — the originating session is invalidated, the session's TTL expires, or the user signs in, signs up, or authenticates as a different identity on the same connection — the subscription keeps delivering notifications under the old, stale auth state, and the `PERMISSIONS` that should now apply to the connection are never consulted.

Impact A user whose session has been revoked, expired, signed out of, or re-authenticated on the same connection continues to receive real-time notifications evaluated against the prior principal. The attacker does not gain access to new resources — only continued access to resources the prior principal was…

Published by the source

1 Jul 2026, 20:16 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-4m82-p8cx-f94j

2. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-4m82-p8cx-f94j

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# Patch Next advisory brief: CVE-2026-63753

Advisory: SurrealDB: LIVE query subscriptions survive session state changes, bypassing access controls
IDs: CVE-2026-63753, GHSA-4m82-p8cx-f94j
Record: https://patchnext.com/advisories/ghsa-4m82-p8cx-f94j (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 4.3)
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-4m82-p8cx-f94j (GitHub-reviewed advisory GHSA-4m82-p8cx-f94j lists affected ranges: crates.io surrealdb >=0 <3.1.0)
- Verified: https://osv.dev/vulnerability/GHSA-4m82-p8cx-f94j (OSV record GHSA-4m82-p8cx-f94j lists affected ranges: crates.io surrealdb >=0 <3.1.0 (fixed))

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