SurrealDB before 3.3.0 Cross-Tenant Access via Headers (CVE-2026-102876) | HOL Guard CVE

High · CVSS 8.6CVE-2026-102876

SurrealDB before 3.3.0 Cross-Tenant Access via Headers

Answer in brief

CVE-2026-102876 records a High severity (CVSS 8.6) vulnerability in SurrealDB before 3.3.0 Cross-Tenant Access via Headers. The current sources do not mark it as known exploited. The current feed maps surrealdb/surrealdb (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps surrealdb/surrealdb (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
surrealdb/surrealdbgeneric	>=0 <3.3.0	3.3.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for surrealdb/surrealdb.
Review the reported fix. Update surrealdb/surrealdb to 3.3.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.