CVE-2026-102876

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.

• https://github.com/surrealdb/surrealdb
• https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs
• https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31
• https://github.com/surrealdb/surrealdb/releases/tag/v3.3.0
• https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vx2p-7hhm-wv62
• https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-headers