CVE-2026-102876
SurrealDB before 3.3.0 Cross-Tenant Access via Headers
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | surrealdb |
| Product | surrealdb |
| Published | Sep 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
surrealdb / surrealdb
0 < 3.3.0
References
github.com: https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vx2p-7hhm-wv62 github.com: https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31 github.com: https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs github.com: https://github.com/surrealdb/surrealdb/releases/tag/v3.3.0 github.com: https://github.com/surrealdb/surrealdb vulncheck.com: https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-headers
Credits
Alpesh Bhagwatkar