---
id: CVE-2026-87897
title: >-
  A SSRF vulnerability found that enables access to internal Chrome Devtools
  Protocol APIs that can leak the JWT authentication token for another user
summary: >-
  A SSRF vulnerability found that enables access to internal Chrome Devtools
  Protocol APIs that can leak the JWT authentication token for another user. A
  low privileged attacker could continually exploit this vulnerability to leak
  the JWT …
severity: medium
cvss: 4.6
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: Nextcloud
product: whiteboard
affected:
  - whiteboard >= 1.0.0 < 1.0.0
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T16:15:34.742Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87897'
references:
  - url: 'https://hackerone.com/reports/3576823'
tags:
  - cve.org
ingestedAt: '2026-10-27T16:32:34.404Z'
---

## Overview

A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT authentication token for another user when they start a recording, which then enables the attacker read/write access to the victim's Whiteboard.

## Affected

- `whiteboard >= 1.0.0 < 1.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.