CVE-2026-94488: Telegram Desktop

High severity, CVSS 8.2. EPSS: 0.1% chance of exploitation in the next 30 days.

Telegram Desktop before 6.9.4 allows XSS in the HTML exporter. (The first fixed stable version is 7.0.1.) This occurs in button.text.toUtf8 in export_output_html.cpp. Exploitation cannot occur unless HTML export was used by a victim. However, the exploit payload can be exported if a message were forwarded into a group by a member (it is not necessary for the message author to be a member of a group).

Affected products

• Telegram Telegram Desktop: from 4.15.1, before 6.9.4 (fixed in 6.9.4)

Published 2026-09-21. Last modified 2026-09-22.