8.3

CVE-2026-94488: telegram telegram_desktop Cross-site Scripting

CVSS: 8.3v4.0HighAwaiting analysis
AliasesDEBIAN-CVE-2026-94488
Published 21-09-2026Last modified 21-09-2026
Open JSON

Vulnerability summary

CVE-2026-94488 is a high (CVSS 8.3) Cross-site Scripting vulnerability in telegram telegram_desktop. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.3/10
010
High · v4.0 (CVE.org)
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 21-09-2026
    PublishedVulnerability first disclosed.
  2. 21-09-2026
    Last modifiedVulnerability information updated.

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).

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

22-09-202620-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (expatch.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • telegram-desktopAll versions (No fix recorded)
Telegram1 product

2 vendors · 2 products

References

7 links