{"id":"CVE-2026-94488","published":"2026-09-21T18:17:17.173","lastModified":"2026-09-22T19:56:19.073","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).","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://expatch.com/writeups/telegram-html-export-xss.html","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4","tags":[]},{"url":"https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html","tags":[]}],"exploitRefs":[{"url":"https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9","tags":[]},{"url":"https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows for Cross-Site Scripting (XSS) in the HTML exporter of Telegram Desktop before 6.9.4, which could lead to arbitrary script execution in the victim's browser if they opened a maliciously crafted message.","exploitability":"Exploitation is moderately difficult as it requires a victim to open a forwarded message containing the exploit payload in a group chat. The attacker must first craft and send the malicious message.","blast_radius":"If exploited, the impact is limited to the victim's browser, potentially leading to data theft or further attacks if the victim's session is compromised.","remediation":"Upgrade to Telegram Desktop 7.0.1 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["xss","html-export","telegram"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-02T08:51:16.004Z"}}