---
id: "CVE-2026-126766"
page: "https://infrastack.ai/live/CVE-2026-126766"
kind: "vulnerability"
aliases: ["CVE-2026-126766"]
title: "OpsTree REMS: authenticated users can falsify incident reporter attribution"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["incident-management", "ops-tree-rems", "other", "self-hosted"]
not_affected_if: ["unauthenticated-only-access"]
published_at: "2026-11-11T19:17:36+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-2026-126766", "first_seen_at": "2026-11-11T19:28:46+00:00"}]
exploit_sources: []
---

# OpsTree REMS: authenticated users can falsify incident reporter attribution

Link for people: https://infrastack.ai/live/CVE-2026-126766 (this .md is for agents)

OpsTree REMS through 1.0.0 trusts a client-supplied reporter field when creating or updating incidents. An authenticated user can record an incident as reported by someone else, corrupting the audit trail.

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

## How to check

- Check whether the installed REMS version is `1.0.0` or earlier
- Look for the incident API endpoints `POST /api/v1/incidents` and `PATCH /api/v1/incidents/{id}/status` in your deployment
- Confirm whether the reporter field is accepted from the client rather than set from the session

## Timeline

- 2026-11-11T19:28:46+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126766

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/opstree-rems-through-1.0.0-reporter-spoofing-via-api-v1-incidents

## From the sources

OpsTree REMS through 1.0.0 contains an improper authorization vulnerability that allows authenticated users to set an incident's reporter to another user by supplying a client-controlled reporter field. Attackers can send crafted POST /api/v1/incidents or PATCH /api/v1/incidents/{id}/status requests to falsify incident attribution and corrupt the accountability audit trail.

---

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