CVE-2026-94488
highTelegram Desktop before 6.9.4 allows XSS in the HTML exporter.
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
8.2
8.2 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (cve@mitre.org)
Timeline (UTC)
Published: 2026-09-21 18:17
Modified: 2026-09-22 19:56
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 06:54 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://expatch.com/writeups/telegram-html-export-xss.html cve@mitre.org
- https://github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output... cve@mitre.org
- https://github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae092... cve@mitre.org
- https://github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df... cve@mitre.org
- https://github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4 cve@mitre.org
- https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html cve@mitre.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗