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CVE-2026-21440— AdonisJS Path Traversal in Multipart File Handling

Quick assessment

Affected
adonisjs core
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

bodyparser是AdonisJS Framework开源的一个AdonisJS上的BodyParser中间件。 bodyparser 10.1.1及之前版本和11.0.0-next.6之前版本存在路径遍历漏洞，该漏洞源于多部分文件处理存在路径遍历，可能导致向服务器文件系统任意位置写入任意文件。

AI Predicted 8.8 Difficulty: Easy EPSS 1.03% · P63
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I. Basic Information for CVE-2026-21440

Vulnerability Information
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Vulnerability Title
AdonisJS Path Traversal in Multipart File Handling
Source: CVE Program / CVE List V5
Vulnerability Description
AdonisJS is a TypeScript-first web framework. A Path Traversal vulnerability in AdonisJS multipart file handling may allow a remote attacker to write arbitrary files to arbitrary locations on the server filesystem. This impacts @adonisjs/bodyparser through version 10.1.1 and 11.x prerelease versions prior to 11.0.0-next.6. This issue has been patched in @adonisjs/bodyparser versions 10.1.2 and 11.0.0-next.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
bodyparser 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
bodyparser是AdonisJS Framework开源的一个AdonisJS上的BodyParser中间件。 bodyparser 10.1.1及之前版本和11.0.0-next.6之前版本存在路径遍历漏洞，该漏洞源于多部分文件处理存在路径遍历，可能导致向服务器文件系统任意位置写入任意文件。
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

Vendor Product Affected Versions CPE Subscribe
adonisjs core < 10.1.2 -

II. Public POCs for CVE-2026-21440

# POC Description Source Link Shenlong Link
1 CVE-2026-21440 https://github.com/Ashwesker/Ashwesker-CVE-2026-21440 POC Details
2 Advanced detection-only PoC for CVE-2026-21440 affecting AdonisJS BodyParser. No exploitation included. https://github.com/you-ssef9/CVE-2026-21440 POC Details
3 poc and writeup for cve-2026-21440: a critical path traversal vulnerability in @adonisjs/bodyparser allowing arbitrary file writing https://github.com/k0nnect/cve-2026-21440-writeup-poc POC Details
4 CVE-2026-21440 https://github.com/redpack-kr/Ashwesker-CVE-2026-21440 POC Details
5 None https://github.com/TibbersV6/CVE-2026-21440-POC-EXP POC Details
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III. Intelligence Information for CVE-2026-21440

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Patches & Fixes for CVE-2026-21440 (2)

Vendor Advisories for CVE-2026-21440 (1)

Other References for CVE-2026-21440 (2)

IV. Related Vulnerabilities

Same product: core
Same vendor: adonisjs
Same weakness: CWE-22

V. Comments for CVE-2026-21440

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