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).
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Mon, 21 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Title HTML Export XSS in Telegram Desktop

Mon, 21 Sep 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Telegram desktop
Vendors & Products Telegram desktop

Mon, 21 Sep 2026 17:30:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-21T17:51:18.874Z

Reserved: 2026-09-21T17:29:01.000Z

Link: CVE-2026-94488

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-21T18:17:17.173

Modified: 2026-09-21T18:17:17.173

Link: CVE-2026-94488

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T18:45:18Z

Weaknesses