OpenSpug up to 3.4.0/4.0.1 File Transfer /exec/transfer os command injection

Summaryinfo

A vulnerability has been found in OpenSpug Spug up to 3.4.0/4.0.1 and classified as very critical. Affected is an unknown function of the file /exec/transfer of the component File Transfer. The manipulation leads to os command injection. This vulnerability is referenced as CVE-2026-108540. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in OpenSpug Spug up to 3.4.0/4.0.1. It has been rated as very critical. This issue affects an unknown part of the file /exec/transfer of the component File Transfer. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-108540. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/10/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• OpenSpug

Name

• Spug

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4.0
• 4.0.0
• 4.0.1

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #948328: OpenSpug spug 3.4.0 Command Injection (by WenGui)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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