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CVE-2026-121423

SurrealDB before 3.3.0 DoS via Unbounded Recursion in val::Value Serialization

SurrealDB before 3.3.0 contains an unbounded recursion vulnerability that allows authenticated users to abort the surreald process by triggering stack overflow on deeply nested values. Attackers can repeatedly run UPDATE statements wrapping a stored array in itself, then SELECT or EXPORT it, causing persistent denial of service for all tenants.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121419

SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision

SurrealDB from 3.1.0 before 3.3.0 contains an improper authentication vulnerability where the MCP BoundSubject fingerprint uses the access method name instead of per-user identity for JWT/Bearer access. Attackers with a valid low-privilege token for the same access method and a victim's mcp-session-id can hijack the session and execute MCP tools with the victim's roles and permissions.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121422

SurrealDB from 3.1.0 before 3.3.0 SSRF via JWKS Implicit Default Port Bypass

SurrealDB from 3.1.0 before 3.3.0 contains a server-side request forgery vulnerability that allows database Owners to bypass port-specific deny-net rules by using JWKS URLs with implicit default ports. Attackers can configure a JWT or record access method whose JWKS URL omits port 80 or 443, causing blind GET requests to explicitly denied internal services.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121418

SurrealDB 3.1.0 before 3.3.0 Incorrect Authorization via Streaming Index Planner

SurrealDB from 3.1.0 before 3.3.0 contains an incorrect authorization vulnerability that allows record users to infer restricted field values because the streaming planner uses indexes on fields with restrictive SELECT permissions. Attackers can issue full-text MATCHES, compound B-tree, or HNSW KNN queries against restricted fields to learn which records contain guessed values or nearest vectors.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121420

SurrealDB 3.2.0 before 3.3.0 SSRF Guard Bypass via IPv6 Transition Addresses

SurrealDB from 3.2.0 before 3.3.0 contains a server-side request forgery vulnerability in the FilteringResolver is_private_ip check that fails to unwrap NAT64, 6to4, and Teredo IPv6 addresses. Authenticated users triggering outbound HTTP requests via SurrealQL http functions can use transition addresses embedding private IPv4 targets to reach localhost, internal services, or cloud metadata endpoints.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121416

SurrealDB 2.0.0 before 3.3.1 deny-funcs Capability Bypass via Method-Style Invocations

SurrealDB 2.0.0 before 3.3.1 does not enforce --deny-funcs restrictions on method-style function calls in the streaming engine, because MethodPart::evaluate invokes resolved functions without a capability check. Authenticated users who can submit queries can run denied functions via method syntax, e.g. [1,2].map() or $f.put()/$f.get() to write and read file bucket data despite file::* denials.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121421

SurrealDB 3.1.0 before 3.3.0 SSRF via Port-Specific --deny-net Host Aliasing Bypass

SurrealDB 3.1.0 before 3.3.0 contains a server-side request forgery vulnerability in network-capability matching because port-specific --deny-net rules (HOST:PORT or IP:PORT) match only a literal host string, while the resolved-IP check discards the port. Authenticated users can call http::* functions with a hostname resolving to a denied IP, or the IP of a denied hostname, to reach blocked internal services.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-121417

SurrealDB before 3.3.0 Use-After-Free via affinitypool spawn_local in KV Backends

SurrealDB before 3.3.0 contains a use-after-free vulnerability in surrealdb-core KV backends that pass borrowed transaction state into affinitypool::spawn_local closures relying on future Drop for safety. Rust embedders that leak a dispatched future (e.g. via mem::forget) and drop the transaction cause pool workers to read and write freed memory, risking crashes or memory corruption.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2024-58366

SurrealDB before 1.1.1 Format String via Scripting Functions

SurrealDB before 1.1.1 contains a format string vulnerability in the rquickjs Exception::throw_type function when scripting is enabled. Attackers with scripting privileges can supply format string sequences in error inputs to read arbitrary memory or execute code with SurrealDB process privileges.

CVSS 4.0 · 9 Critical EPSS < 1% KEV · Not listed
Vendors
Delskayn Surrealdb
Products
Rquickjs Surrealdb
CVE-2024-58363

SurrealDB before 1.5.4 Authentication Bypass via Database Switch

SurrealDB before 1.5.4 and 2.0.0-alpha.1 before 2.0.0-alpha.6 fails to properly validate authentication when a scope user switches databases using the USE clause or use method. Attackers with an authenticated session can impersonate an unrelated user in a different database if a user record with an identical identifier exists, allowing unauthorized actions if permissions rely solely on the $auth parameter.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109341

SurrealDB before 3.3.0 Field Permission Bypass via PATCH copy/move/test Operations

SurrealDB before 3.3.0 contains an authorization bypass vulnerability that allows callers with table-level write permission to read SELECT-restricted fields by resolving JSON Patch pointers against the unreduced record. Attackers can use PATCH copy or move operations to copy hidden fields into readable destinations, or abuse test mismatch errors as a disclosure oracle.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109336

SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT $before/$after

SurrealDB before 3.3.0 contains an authorization bypass vulnerability that allows record users to read fields hidden by field-level SELECT permissions through LIVE SELECT projections. Attackers can project restricted fields from the unreduced $after or $before parameters under an alias to receive exact stored values in CREATE, UPDATE, and DELETE notifications.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109342

SurrealDB 3.0.0 before 3.3.0 Missing Authentication in revoke RPC Method

SurrealDB from 3.0.0 before 3.3.0 contains a missing authentication vulnerability in the revoke RPC method that allows low-privileged or unauthenticated callers to invalidate other users' refresh tokens without proof of possession. Attackers can obtain grant identifiers via ACCESS SHOW ALL with VIEWER permission or leaked tokens, then permanently revoke refresh tokens to force re-authentication.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109337

SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT WHERE Clause

SurrealDB before 3.3.0 contains an authorization bypass vulnerability that allows record users to infer field values hidden by field-level SELECT permissions using LIVE SELECT WHERE predicates over $before or $after. Attackers can craft repeated predicates and observe whether notifications are delivered on CREATE, UPDATE, or DELETE to confirm or narrow restricted field values.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109335

SurrealDB 3.0.0 before 3.3.0 Information Disclosure via COMPUTED Fields

SurrealDB from 3.0.0 before 3.3.0 contains an information disclosure vulnerability that allows record users to read values hidden by field-level SELECT permissions through COMPUTED fields. Attackers can select records whose readable COMPUTED fields derive from hidden fields, or use write RETURN clauses with $before/$after to expose hidden values.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109340

SurrealDB 3.1.0 before 3.3.0 Authorization Bypass via REFERENCE ON DELETE CASCADE

SurrealDB from 3.1.0 before 3.3.0 contains an authorization bypass vulnerability that allows authenticated users to delete protected graph edges by triggering a REFERENCE ON DELETE CASCADE. Attackers with delete permission on a referenced table can delete a record whose cascade disables permission checks for edge cleanup, erasing edges despite the edge table's PERMISSIONS FOR delete clause.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109343

SurrealDB before 3.3.0 Cross-Tenant Access via USE Statement

SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement switches a session to any namespace/database without checking that the caller's authenticated level covers it. Authenticated namespace, database, or record users can switch to another tenant and read, create, update, or delete rows in tables whose PERMISSIONS allow it, such as PERMISSIONS FULL.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109339

SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering

SurrealDB 3.1.0 before 3.3.0 lets Surrealism modules exhaust server memory because module stdout/stderr lines are buffered unbounded in host memory, bypassing the configured module memory limit. An attacker can run an Owner-installed malicious module that writes output without newlines, crashing the server and denying service to all namespaces and databases.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb Surrealism-runtime
CVE-2026-109338

SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values

SurrealDB before 3.3.0 contains a denial of service vulnerability that allows query-capable users to crash the server by reading non-ASCII header values in embedded JavaScript. Attackers with scripting enabled can read such values via Headers get(), entries(), values(), or getSetCookie(), or return them from fetch() endpoints, aborting the server process.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb
CVE-2026-109334

SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use

SurrealDB before 3.3.0 does not check the caller-selected namespace or database against the level at which a namespace- or database-level system user authenticated, allowing cross-tenant access. An authenticated attacker can set the Surreal-NS/Surreal-DB headers on /sql or call the RPC use method to read, create, modify, and delete rows and read DEFINE PARAM values in another tenant where table PERMISSIONS allow it.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Surrealdb
Products
Surrealdb