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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-40242— Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint

Quick assessment

Affected
getarcaneapp arcane
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.

arcane是Arcane开源的一个Docker管理软件。 Arcane 1.17.3之前版本存在代码问题漏洞，该漏洞源于/api/templates/fetch端点接受调用者提供的url参数并进行无身份验证、无URL方案或主机验证的服务端HTTP GET请求，可能导致未经验证的服务端请求伪造。

CVSS 7.2 · High EPSS 0.72% · P53

Public Exploits 1

Nuclei · 1 CVE-2026-40242.yaml [template]

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-40242

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.17.3, the /api/templates/fetch endpoint accepts a caller-supplied url parameter and performs a server-side HTTP GET request to that URL without authentication and without URL scheme or host validation. The server's response is returned directly to the caller. type. This constitutes an unauthenticated SSRF vulnerability affecting any publicly reachable Arcane instance. This vulnerability is fixed in 1.17.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
arcane 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
arcane是Arcane开源的一个Docker管理软件。 Arcane 1.17.3之前版本存在代码问题漏洞，该漏洞源于/api/templates/fetch端点接受调用者提供的url参数并进行无身份验证、无URL方案或主机验证的服务端HTTP GET请求，可能导致未经验证的服务端请求伪造。
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
getarcaneapp arcane < 1.17.3 -

II. Public POCs for CVE-2026-40242

# POC Description Source Link Shenlong Link
1 Arcane <= 1.17.3 contains an unauthenticated server-side request forgery caused by lack of URL scheme and host validation in /api/templates/fetch endpoint, letting remote attackers perform SSRF, exploit requires no authentication. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-40242.yaml POC Details
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-40242

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-40242 (1)

Vendor Pages for CVE-2026-40242 (1)

IV. Related Vulnerabilities

Same product: arcane
Same vendor: getarcaneapp
Same weakness: CWE-918

V. Comments for CVE-2026-40242

No comments yet

Leave a comment