Server-Side Request Forgery in ArcReel by WaterHunter
CVE-2026-121581

5.3MEDIUM

Key Information:

Vendor

WaterHunter

Status
Arcreel
Vendor
CVE Published:
3 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-121581?

A vulnerability has been identified in the Provider Test-Connection Endpoint of ArcReel versions 0.32.0 to 0.34.0. This vulnerability allows for server-side request forgery, potentially enabling remote attackers to manipulate server requests. The affected endpoint, located at /api/v1/providers/{id}/test, is targeted through an unspecified method, which raises serious security concerns. As of now, the vendor has not responded to notifications regarding this exploit, highlighting the urgency for users to evaluate and secure their systems.

Affected Version(s)

ArcReel 0.32.0

ArcReel 0.33.0

ArcReel 0.34.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-121581 - Proof of Concept

References

https://vuldb.com/vuln/430416
vdb-entry
https://vuldb.com/vuln/430416/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121581
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

waterhunter (VulDB User)
VulDB CNA Team
.