OS Command Injection Vulnerability in Spotweb by Spotweb
CVE-2026-108546

7.7HIGH

Key Information:

Vendor

Spotweb

Status
Spotweb
Vendor
CVE Published:
10 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-108546?

Spotweb versions up to 1.5.8 are susceptible to an OS command injection vulnerability within the runcommand NZB handler. This flaw permits remote attackers to execute arbitrary commands by leveraging crafted titles in self-signed posts. When a user downloads a spot, the title including shell metacharacters is directly used in an exec() call, allowing attackers to manipulate the execution context under the Spotweb PHP process. Mitigating this vulnerability requires adopting secure coding practices and validating user inputs to avoid unauthorized command execution.

Affected Version(s)

spotweb 0 <= 1.5.8

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-2026-108546 - Proof of Concept

References

https://hackmd.io/@haind/spotweb-runcommand-title-injection
technical-descriptionexploit
https://github.com/spotweb/spotweb
product
https://github.com/spotweb/spotweb/blob/1.5.8/lib/service...
technical-description

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.