{"id":"CVE-2026-94488","title":"Telegram Desktop before 6.9.4 allows XSS in the HTML exporter","summary":"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. How…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","cwe":["CWE-79"],"vendor":"Telegram","product":"Telegram Desktop","affected":["desktop >= 4.15.1 < 6.9.4"],"published":"2026-09-21","updated":"2026-09-21","sourceUpdated":"2026-09-21T18:17:17.173","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-94488","references":[{"url":"https://expatch.com/writeups/telegram-html-export-xss.html","label":"cve@mitre.org"},{"url":"https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp","label":"cve@mitre.org"},{"url":"https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924","label":"cve@mitre.org"},{"url":"https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9","label":"cve@mitre.org"},{"url":"https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4","label":"cve@mitre.org"},{"url":"https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html","label":"cve@mitre.org"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-21T17:51:08.525648Z"},"ingestedAt":"2026-09-21T17:49:53.179Z","slug":"CVE-2026-94488","body":"## Overview\n\nTelegram 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).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":208714,"id":"CVE-2026-94488","ts":1790016705525,"field":"exploit_available","old":"false","new":"true"}]}