CVE-2026-94488: Telegram Telegram Desktop

Cross-site scripting in Telegram Desktop

CVSS 8.3 HighEPSS 0.0014 · 3rd percentile

Published by the CVE Program (CNA: mitre) at 21 Sept 2026, 17:29 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Telegram	Telegram Desktop	affected 4.15.1 to before 6.9.4 semver Other versions: unaffected

Identifiers

CVE-2026-94488

CNA

mitre

Weakness (CWE)

CWE-79

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.3	High	4.0	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	CNA (mitre)Used for this record
8.2	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N	CNA (mitre)

CISA KEV Not listed.
EPSS 0.0014, the 3rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 21 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/telegramdesktop/tdesktop/commit/8457d13aa795fadf99c955d2a04f00ebc3c59df9 patch
github.com/telegramdesktop/tdesktop/commit/52c779bffa8dde3c5c09826add2607328fae0924 related
github.com/telegramdesktop/tdesktop/releases/tag/v6.9.4 release-notes
github.com/telegramdesktop/tdesktop/blob/v6.9.3/Telegram/SourceFiles/export/output/export_output_html.cpp related
thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html media-coverage
expatch.com/writeups/telegram-html-export-xss.html third-party-advisorytechnical-descriptionexploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.