Is CVE-2026-108521 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-108521 being exploited in the wild.

How severe is CVE-2026-108521?

Medium severity, with a CVSS score of 4.7, published 11 October 2026.

Which products and versions are affected?

Studio-Saelix Sencho up to 0.97.1.

How is CVE-2026-108521 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-108521?

Check whether you run Studio-Saelix Sencho at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-108521: Studio-Saelix Sencho server-side request forgery in Add Remote Node API

CVE-2026-108521 · Severity: medium · CVSS 4.7 · Published 2026-10-11

Sencho is a self-hosted Docker Compose management platform. An authenticated user with node-management permissions can configure a remote node API endpoint to make the Sencho backend server connect to internal hosts and services that should be restricted, potentially exposing sensitive data like cloud instance credentials.

Technologies: Studio-Saelix Sencho. Vendors: Studio-Saelix.

Quick answers

Is CVE-2026-108521 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-108521 being exploited in the wild.
How severe is CVE-2026-108521?: Medium severity, with a CVSS score of 4.7, published 11 October 2026.
Which products and versions are affected?: Studio-Saelix Sencho up to 0.97.1.
Is there a fix for CVE-2026-108521?: No fixed version is recorded yet. Restrict the node-management permission to only trusted administrators. Configure firewall rules to prevent the Sencho backend from making outbound connections to internal metadata services (169.254.169.254) and private networks.</anigation> </invoke> If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-108521 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-108521?: Check whether you run Studio-Saelix Sencho at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Restrict the node-management permission to only trusted administrators. Configure firewall rules to prevent the Sencho backend from making outbound connections to internal metadata services (169.254.169.254) and private networks.</anigation> </invoke>

Technical details

A server-side request forgery (SSRF) vulnerability exists in the isValidRemoteUrl validation function (backend/src/utils/validation.ts) used by the Add Remote Node API endpoint (POST /api/nodes). The validation logic uses a simple regex pattern on the raw input string and fails to normalize the URL according to the WHATWG spec or resolve DNS names before comparison, allowing bypasses via public DNS wildcards (e.g., nip.io), IPv4-mapped IPv6 literals (e.g., [::ffff:127.0.0.1]), or unfiltered cloud metadata ranges (169.254.169.254). Requires authentication and the node-management permission to exploit.

Affected products

Studio-Saelix Sencho up to 0.97.1

Timeline

2026-10-11: disclosed: Vulnerability publicly disclosed

References

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