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).
Published: 2026-09-21
Score: 8.3 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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'}


Subscriptions

Telegram Desktop Telegram Desktop
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
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')