Main Vulnerability Database Vulnerabilities #VU124764

Missing Authorization in Zulip Server - CVE-2026-25742

Published: April 1, 2026

Vulnerability identifier: #VU124764

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-25742

CWE-ID: CWE-862

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to missing authorization after disabling spectator access. A remote attacker can gain access to file contents.

Zulip Server

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.