# CVE-2026-121418: SurrealDB authorization bypass via streaming index planner

Source: https://junglewise.ai/threats/cve-2026-121418-surrealdb-from-3-1-0-before-3-3-0-contains-an-incorrect  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-121418 · Severity: medium · CVSS 4.3 · Published 2026-11-03

SurrealDB is a NoSQL database that stores and retrieves structured data. This vulnerability allows authenticated users to infer the values of restricted database fields by crafting search queries against database indexes, bypassing field-level access controls. An attacker with valid database credentials can learn the content of fields they should not have permission to view.

Technologies: [Surrealdb](https://junglewise.ai/threats/technologies/surrealdb-surrealdb). Vendors: [SurrealDB](https://junglewise.ai/threats/vendors/surrealdb).

## Quick answers

**Is CVE-2026-121418 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121418 being exploited in the wild.

**How severe is CVE-2026-121418?** Medium severity, with a CVSS score of 4.3, published 3 November 2026.

**Which products and versions are affected?** Surrealdb 3.1.0 to 3.2.x.

**Is there a fix for CVE-2026-121418?** Yes: fixed in 3.3.0. Until then: Restrict database access to trusted users and networks until upgrading. Consider disabling field-level permissions on non-sensitive data or applying additional application-level access controls to sensitive information. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121418 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121418?** Check whether you run Surrealdb at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.3.0

Restrict database access to trusted users and networks until upgrading. Consider disabling field-level permissions on non-sensitive data or applying additional application-level access controls to sensitive information.

## Technical details

The streaming execution engine fails to re-evaluate access control restrictions when using full-text, B-tree, and HNSW vector indexes on restricted fields. The vulnerability exists in the index planner which removes index-covered predicates without checking field-level SELECT permissions, allowing an authenticated attacker to query restricted fields through index scans (MATCHES, compound B-tree, or KNN operations) and infer restricted values by observing which records match.

## Affected products

- SurrealDB SurrealDB 3.1.0 to 3.2.x

## Timeline

- 2026-10-19: disclosed
- 2026-11-03: advisory

## References

- [https://github.com/surrealdb/surrealdb/security/advisories/GHSA-x6mm-9295-rvph](https://github.com/surrealdb/surrealdb/security/advisories/GHSA-x6mm-9295-rvph)
- [https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-incorrect-authorization-via-streaming-index-planner](https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-incorrect-authorization-via-streaming-index-planner)

## Related threats

- [SurrealDB unbounded recursion in value serialization](https://junglewise.ai/threats/cve-2026-121423-surrealdb-before-3-3-0-contains-an-unbounded-recursion)
- [SurrealDB server-side request forgery in JWKS URL validation](https://junglewise.ai/threats/cve-2026-121422-surrealdb-from-3-1-0-before-3-3-0-contains-a-server-side-request)
- [SurrealDB server-side request forgery in network deny rules](https://junglewise.ai/threats/cve-2026-121421-surrealdb-3-1-0-before-3-3-0-contains-a-server-side-request)
- [SurrealDB MCP session hijack via BoundSubject fingerprint collision](https://junglewise.ai/threats/cve-2026-121419-surrealdb-from-3-1-0-before-3-3-0-contains-an-improper)
- [SurrealDB deny-funcs capability bypass via method-style invocations](https://junglewise.ai/threats/cve-2026-121416-surrealdb-2-0-0-before-3-3-1-does-not-enforce-deny-funcs)