SurrealDB before 3.3.0 Cross-Tenant Access via Headers

Advisories

SurrealDB before 3.3.0 Cross-Tenant Access via Headers

severity: high
date: 9/29/2026
Affecting: surrealdb >= 0, < 3.3.0
CVE: CVE-2026-102876
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 8.6
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-vx2p-7hhm-wv62)
https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31
https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs
surrealdb v3.3.0 Release Notes
https://github.com/surrealdb/surrealdb
Credit: Alpesh Bhagwatkar
Description: SurrealDB before 3.3.0 contains an authorization bypass in HTTP session construction where check_auth() verifies credentials against Surreal-Auth-NS and Surreal-Auth-DB headers but constructs sessions using Surreal-NS and Surreal-DB headers without validating access permissions. Attackers can authenticate as a user from one tenant while selecting another tenant's namespace and database to read, create, and modify records across tenant boundaries.

Ready to get Started?

Explore VulnCheck, a next-generation Cyber Threat Intelligence platform, which provides exploit and vulnerability intelligence to help you prioritize and remediate vulnerabilities that matter.

Vulnerability Prioritization
Prioritize vulnerabilities that matter based on the threat landscape and defer vulnerabilities that don't.
Early Warning System
Real-time alerting of changes in the vulnerability landscape so that you can take action before the attacks start.

Schedule a Demo