CVE-2026-87897

MediumCVSS 4.6/10Last modified Nov 4, 2026

Description

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.

Metrics

CVSS 3.0 4.6/10CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-918

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Nextcloud	whiteboard	>= 1.0.0, < 1.0.0

References

https://hackerone.com/reports/3576823

Timeline

Published: Oct 27, 2026
Last modified: Nov 4, 2026
NVD status: Awaiting Analysis

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