high8.2
CVE-2026-94488
Telegram Desktop before 6.9.4 allows XSS in the HTML exporter.
Impact
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
| Product | Affected versions |
|---|---|
| Telegram Desktop | before 6.9.4 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://expatch.com/writeups/telegram-html-export-xss.html
- https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp
- https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924
- https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9
- https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4
- https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html