Vulnerability Description
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).
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://expatch.com/writeups/telegram-html-export-xss.html
- https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/exp
- https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add260
- https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f0
- https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4
- https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html
FAQ
What is CVE-2026-94488?
CVE-2026-94488 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...
How severe is CVE-2026-94488?
CVE-2026-94488 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-94488?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.