---
id: "CVE-2026-116018"
kind: "vulnerability"
aliases: ["CVE-2026-116018"]
title: "ONEARMY community-platform: authenticated users can mark others' notifications read"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["community-platform", "multi-tenant", "other", "self-hosted"]
not_affected_if: ["already-patched", "single-user"]
published_at: "2026-10-24T12:16:58+00:00"
first_seen_at: "2026-10-24T12:47:58+00:00"
updated_at: "2026-10-25T04:18:41+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116018", "first_seen_at": "2026-10-24T12:47:58+00:00"}]
---

# ONEARMY community-platform: authenticated users can mark others' notifications read

ONEARMY community-platform before 2.165.2 lets any logged-in user call POST /api/notifications/:id/read on notification IDs that belong to other users. An attacker can iterate sequential IDs to silently clear other users' unread notifications, so they miss replies and comments.

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

## How to check

- Check the installed community-platform version and see whether it is below `2.165.2`.
- Review whether `POST /api/notifications/:id/read` verifies that the notification belongs to the requesting user.

## Fix

- Upgrade community-platform to `2.165.2` or later.

## Timeline

- 2026-10-24T12:47:58+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116018

## From the sources

ONEARMY community-platform before 2.165.2 contains an insecure direct object reference vulnerability that allows authenticated users to mark other users' notifications as read via POST /api/notifications/:id/read. Attackers can iterate sequential notification IDs to suppress unread indicators of users in the same tenant, causing them to miss replies, comments and new-content notices.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_