High severity · published Sep 29, 2026
CVE-2026-102876
SurrealDB before 3.3.0 Cross-Tenant Access via Headers
8.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
surrealdb · surrealdb
before 3.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102876
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102876
vendor-advisory
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vx2p-7hhm-wv62
patch
https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31
technical-description
https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs
release-notes
https://github.com/surrealdb/surrealdb/releases/tag/v3.3.0
product
https://github.com/surrealdb/surrealdb
third-party-advisory
https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-headers
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