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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-109338— SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values

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 3.3.0 版本之前，存在一个拒绝服务漏洞。该漏洞允许具有查询权限的用户通过读取嵌入 JavaScript 中的非 ASCII 头部值来导致服务器崩溃。在启用脚本功能的攻击者可以利用 Headers 的 get()、entries()、values() 或 getSetCookie() 方法，或通过 fetch() 端点返回此类值，从而导致服务器进程中止。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
surrealdb surrealdb < 3.3.0 affected
3.3.0 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-109338

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 before 3.3.0 Denial of Service via Headers Non-ASCII Values
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
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-2026-109338

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-109338

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-109338 (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-2026-109335 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-2026-109339 4.9 MEDIUM SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering
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-248

V. Comments for CVE-2026-109338

No comments yet

Leave a comment