Gravitl Netmaker up to 1.7.0 ExtClient handler {clientid} updateExtClient handler network/clientid authorization

Summaryinfo

A vulnerability, which was classified as very critical, was found in Gravitl Netmaker up to 1.7.0. This impacts the function updateExtClient handler of the file /api/extclients/{network}/{clientid} of the component ExtClient handler. The manipulation of the argument network/clientid results in authorization. This vulnerability is known as CVE-2026-115325. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Gravitl Netmaker up to 1.7.0. Affected is the function updateExtClient handler of the file /api/extclients/{network}/{clientid} of the component ExtClient handler. The manipulation of the argument network/clientid with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Netmaker through 1.7.0 contains an authorization bypass vulnerability in the updateExtClient handler that allows network-scoped users to modify external clients on other networks. Attackers with external client permissions on one network can send PUT requests to /api/extclients/{network}/{clientid} to replace public keys, disable clients, and obtain WireGuard private keys.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-115325 since 10/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/22/2026).

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

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Productinfo

Vendor

• Gravitl

Name

• Netmaker

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7.0

Website

• Product: https://github.com/gravitl/netmaker/

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