# CVE-2026-108521: Studio-Saelix Sencho Add Remote Node API Endpoint validation.ts isValidRemoteUrl server-side request forgery

> An authenticated user with node-management permissions can exploit a validation flaw in the Add Remote Node API to perform server-side request forgery.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-44m2-rqg4-q7xj

## What is CVE-2026-108521?

CVE-2026-108521 is a medium-severity server-side request forgery vulnerability in Studio-Saelix Sencho, published on 11 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been found in Studio-Saelix Sencho up to 0.97.1. Affected by this issue is the function isValidRemoteUrl of the file backend/src/utils/validation.ts of the component Add Remote Node API Endpoint. Such manipulation leads to server-side request forgery. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The vendor confirms: "The node API URL could be configured by an authenticated user with node-management permission and used to initiate server-side requests. [T]he report demonstrates server-side request capability but not arbitrary internal response exfiltration."

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-108521?


## How do I fix CVE-2026-108521?

No fix has been published for CVE-2026-108521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108521 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108521 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108521 and fix it if it is affected.

What it is: CVE-2026-108521 is a medium-severity server-side request forgery vulnerability in Studio-Saelix Sencho, published on 11 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108521 exists.

Affected product: Studio-Saelix Sencho. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-108521/ (Markdown: https://insights.sbomify.com/CVE-2026-108521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108521
- OSV: https://osv.dev/vulnerability/CVE-2026-108521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108521/
Summaries are generated and may contain mistakes; the official description above is the record.