Vulnerability · Published Sep 29, 2026 · Assigned by VulnCheck

CVE-2026-102876SurrealDB before 3.3.0 Cross-Tenant Access via Headers

High 8.1

In plain English

A high-severity authorization bypass via user-controlled key in surrealdb from surrealdb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 80.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
surrealdb	surrealdb	0 – before 3.3.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-vx2p-7hhm-wv62) vendor-advisory
https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31 patch
https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs technical-description
surrealdb v3.3.0 Release Notes release-notes
https://github.com/surrealdb/surrealdb product
VulnCheck Advisory: SurrealDB before 3.3.0 Cross-Tenant Access via Headers third-party-advisory