CVE-2026-94488
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
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).
| CWE | CWE-79 |
| Vendor | telegram |
| Product | telegram desktop |
| Published | Sep 21, 2026 |
| Last Updated | Sep 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Telegram / Telegram Desktop
4.15.1 < 6.9.4
References
github.com: https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9 github.com: https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924 github.com: https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4 github.com: https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp expatch.com: https://expatch.com/writeups/telegram-html-export-xss.html thehackernews.com: https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html