CVE-2026-94488

HTML Export XSS in Telegram Desktop

Published Sep 21, 2026 CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title HTML Export XSS in Telegram Desktop
Type Values Removed Values Added
First Time appeared Telegram desktop
Vendors & Products Telegram desktop
Type Values Removed Values Added
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).
First Time appeared Telegram
Telegram telegram Desktop
Weaknesses CWE-79
CPEs cpe:2.3:a:telegram:telegram_desktop:*:*:*:*:*:*:*:*
Vendors & Products Telegram
Telegram telegram Desktop
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 21, 2026, 5:51 PM
Reserved
Sep 21, 2026, 5:29 PM
Status
Awaiting Analysis
Published
Sep 21, 2026, 6:17 PM
Modified
Sep 22, 2026, 7:56 PM