High 8.1Published Sep 29, 2026

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

Updated under an hour ago (2026-10-19 06:30 UTC)

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EPSS puts the chance of exploitation in the next 30 days at 0.27%, higher than 18% of scored CVEs.

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Exploited in the last 30 days

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: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.27% (percentile 18)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

surrealdb surrealdb surrealdb:surrealdb (from the name)	before 3.3.0; 3.3.0 not affected	CNA record

References

https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vx2p-7hhm-wv62vendor-advisory
https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31patch
https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rstechnical-description
https://github.com/surrealdb/surrealdb/releases/tag/v3.3.0release-notes
https://github.com/surrealdb/surrealdbproduct
https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-headersthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.