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CVE-2026-121417— SurrealDB before 3.3.0 Use-After-Free via affinitypool spawn_local in KV Backends

Quick assessment

Affected
surrealdb surrealdb
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SurrealDB 3.3.0 之前的版本在 surrealdb-core 的 KV 后端中存在一个“释放后使用”（use-after-free）漏洞。该漏洞发生在将借用（borrowed）的事务状态传入 闭包时，这些闭包依赖未来的 操作来确保安全。如果 Rust 嵌入者泄露了已调度的 Future（例如通过 ），随后又丢弃了事务，就会导致线程池工作线程读取或写入已被释放的内存，从而引发程序崩溃或内存损坏。

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-121417

Vulnerability Information
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Vulnerability Title
SurrealDB before 3.3.0 Use-After-Free via affinitypool spawn_local in KV Backends
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
surrealdb surrealdb 0 ~ 3.3.0 -

II. Public POCs for CVE-2026-121417

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III. Intelligence Information for CVE-2026-121417

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Other References for CVE-2026-121417 (3)

Same Patch Batch · surrealdb · 2026-11-03 · 8 CVEs total

CVE-2026-121419 8.1 HIGH SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision
CVE-2026-121416 7.1 HIGH SurrealDB 2.0.0 before 3.3.1 deny-funcs Capability Bypass via Method-Style Invocations
CVE-2026-121423 6.5 MEDIUM SurrealDB before 3.3.0 DoS via Unbounded Recursion in val::Value Serialization
CVE-2026-121418 4.3 MEDIUM SurrealDB 3.1.0 before 3.3.0 Incorrect Authorization via Streaming Index Planner
CVE-2026-121421 4.3 MEDIUM SurrealDB 3.1.0 before 3.3.0 SSRF via Port-Specific --deny-net Host Aliasing Bypass
CVE-2026-121422 4.1 MEDIUM SurrealDB from 3.1.0 before 3.3.0 SSRF via JWKS Implicit Default Port Bypass
CVE-2026-121420 3.3 LOW SurrealDB 3.2.0 before 3.3.0 SSRF Guard Bypass via IPv6 Transition Addresses

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-416