---
id: "CVE-2026-126772"
page: "https://infrastack.ai/live/CVE-2026-126772"
kind: "vulnerability"
aliases: ["CVE-2026-126772"]
title: "OpsTree REMS: authenticated users can post comments as incident creators"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["incident-management", "ops-tree-rems", "other"]
not_affected_if: ["unknown"]
published_at: "2026-11-11T19:17:37+00:00"
first_seen_at: "2026-11-11T19:28:46+00:00"
updated_at: "2026-11-11T19:30:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126772", "first_seen_at": "2026-11-11T19:28:46+00:00"}]
exploit_sources: []
---

# OpsTree REMS: authenticated users can post comments as incident creators

Link for people: https://infrastack.ai/live/CVE-2026-126772 (this .md is for agents)

OpsTree REMS through 1.0.0 lets an authenticated user post comments on incidents as the incident's creator through the comment API endpoint. An attacker with a low-privilege account can impersonate a Super User and alter the incident timeline and audit trail.

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

## How to check

- Check the installed REMS version against the range `1.0.0` and earlier
- Review the incident comment API route `POST /api/v1/incidents/{incident_id}/comment` for author attribution logic

## Timeline

- 2026-11-11T19:28:46+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126772

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/opstree-rems-through-1.0.0-comment-author-spoofing-via-incident-comment-api

## From the sources

OpsTree REMS through 1.0.0 contains an improper attribution vulnerability that allows authenticated users to post comments as the incident creator via POST /api/v1/incidents/{incident_id}/comment. Lower-privileged attackers can comment on incidents owned by users such as a Super User to impersonate them and corrupt the incident timeline and audit trail.

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