---
id: "CVE-2026-126770"
page: "https://infrastack.ai/live/CVE-2026-126770"
kind: "vulnerability"
aliases: ["CVE-2026-126770"]
title: "OpsTree REMS: database Test Connection lets authenticated users probe internal hosts"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "OpsTree REMS", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["ops-tree-rems", "other", "self-hosted"]
not_affected_if: ["auth-required", "no-user-accounts"]
published_at: "2026-11-11T19:17:37+00:00"
first_seen_at: "2026-11-11T19:28:46+00:00"
updated_at: "2026-11-11T19:30:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126770", "first_seen_at": "2026-11-11T19:28:46+00:00"}]
exploit_sources: []
---

# OpsTree REMS: database Test Connection lets authenticated users probe internal hosts

Link for people: https://infrastack.ai/live/CVE-2026-126770 (this .md is for agents)

OpsTree REMS through 1.0.0 has a server-side request forgery flaw in its database Test Connection feature. A logged-in user can make the REMS server connect to arbitrary hosts and ports, including internal addresses, to probe what the server can reach.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:OpsTree REMS affected range not listed fixed no fixed version listed

## How to check

- Check whether the REMS version in use is `1.0.0` or earlier.
- Check whether users with ordinary accounts can reach the database Test Connection feature.

## Timeline

- 2026-11-11T19:28:46+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126770

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/opstree-rems-through-1.0.0-ssrf-via-database-test-connection

## From the sources

OpsTree REMS through 1.0.0 contains a server-side request forgery vulnerability that allows authenticated users to make the backend connect to arbitrary destinations through the database Test Connection feature. Attackers can set a database entry's host and port to localhost, internal addresses, or attacker-controlled servers to probe internal hosts and ports reachable from the REMS server.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_