CVE-2026-40242 (GCVE-0-2026-40242)

Vulnerability from cvelistv5 – Published: 2026-04-10 20:34 – Updated: 2026-04-13 20:54
VLAI Previdian
Title
Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint
Summary
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.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:54 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
getarcaneapp arcane Affected: < 1.17.3
guessed Create a notification for this product.
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 92838de3-d6e8-4d09-993e-6537e19b9f78

Vulnerability ID: CVE-2026-40242

Status: Confirmed

Status Updated: 2026-09-17 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-17
Asserted: 2026-09-17
Scope
Notes: Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint | Affected: Getarcaneapp / arcane | CVSS: 7.2 (HIGH) | EPSS: 0.00621 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint
Cve Id CVE-2026-40242
Vendor Getarcaneapp
Ghsa Id None
Product arcane
Added Date 2026-09-17T00:00:00.000Z
Cvss Score 7.2
Epss Score 0.00621
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.48118
Used In Malware unknown
Vulnerability Id CVE-2026-40242
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-09-18 11:00 UTC | Updated: 2026-09-18 11:00 UTC
Show details on NVD website
To clipboard 

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