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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-56669— Elysia: Inefficient Algorithmic Complexity and Interpretation Conflict

CVSS 7.5 · High EPSS 0.36% · P29

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProductVersion RangeStatus
elysiajselysia< 1.4.29affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-56669

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Elysia: Inefficient Algorithmic Complexity and Interpretation Conflict
Source: CVE Program / CVE List V5
Vulnerability Description
Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of unique key-value pairs and allowing CPU exhaustion. This issue is fixed in version 1.4.29.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Vulnerability Title
Elysia 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
elysia Elysia是elysia个人开发者的一个高性能TypeScript Web框架。 Elysia 1.4.29之前版本存在安全漏洞，该漏洞源于在multipart/form-data端点中使用getAll进行表单数据规范化，导致工作量随唯一键值对数量呈二次方增长，可能造成CPU耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
elysiajselysia < 1.4.29 -

II. Public POCs for CVE-2026-56669

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7113 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-56669

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-56669 (1)

Proof of Concept for CVE-2026-56669 (1)

Vendor Pages for CVE-2026-56669 (1)

IV. Related Vulnerabilities

Same product: elysia
Same vendor: elysiajs
Same weakness: CWE-407

V. Comments for CVE-2026-56669

No comments yet

Leave a comment