Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-109339— SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering

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.

在 SurrealDB 3.1.0 至 3.3.0（不含）版本中，存在一个内存耗尽漏洞。由于模块的 stdout/stderr 输出行在主机内存中未设置缓冲区上限，攻击者可以绕过配置模块的内存限制，导致 Surrealism 模块耗尽服务器内存。通过执行由拥有者（Owner）安装的恶意模块，该模块可在不输出换行符的情况下持续写入输出，最终导致服务器崩溃，使所有命名空间和数据服务不可用，从而引发拒绝服务（DoS）攻击。

CVSS 4.9 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
surrealdb surrealdb 3.1.0< 3.3.0 affected
3.3.0 unaffected
surrealdb surrealism-runtime 0.3.0< 0.6.0 affected
0.6.0 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-109339

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
surrealdb surrealdb 3.1.0 ~ 3.3.0 -
surrealdb surrealism-runtime 0.3.0 ~ 0.6.0 -

II. Public POCs for CVE-2026-109339

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-109339

请登录查看更多情报信息。

Other References for CVE-2026-109339 (2)

Same Patch Batch · surrealdb · 2026-10-12 · 11 CVEs total

CVE-2026-109343 8.1 HIGH SurrealDB before 3.3.0 Cross-Tenant Access via USE Statement
CVE-2026-109334 8.1 HIGH SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use
CVE-2026-109341 7.1 HIGH SurrealDB before 3.3.0 Field Permission Bypass via PATCH copy/move/test Operations
CVE-2026-109333 6.5 MEDIUM SurrealDB 3.0.0 before 3.3.0 Cross-Tenant Record Read via RETURN FETCH
CVE-2026-109338 6.5 MEDIUM SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values
CVE-2026-109335 6.5 MEDIUM SurrealDB 3.0.0 before 3.3.0 Information Disclosure via COMPUTED Fields
CVE-2026-109340 5.4 MEDIUM SurrealDB 3.1.0 before 3.3.0 Authorization Bypass via REFERENCE ON DELETE CASCADE
CVE-2026-109342 5.4 MEDIUM SurrealDB 3.0.0 before 3.3.0 Missing Authentication in revoke RPC Method
CVE-2026-109337 4.3 MEDIUM SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT WHERE Clause
CVE-2026-109336 4.3 MEDIUM SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT $before/$after

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-770

V. Comments for CVE-2026-109339

No comments yet

Leave a comment