CVE-2026-94488 Cross-site scripting in Telegram Desktop
An attacker can execute arbitrary scripts in Telegram Desktop via malicious HTML export content, requiring the victim to use the export feature.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-94488?
CVE-2026-94488 is a high-severity cross-site scripting vulnerability in Telegram Desktop, published on 21 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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).
Weakness: CWE-79
Which versions are affected by CVE-2026-94488?
How do I fix CVE-2026-94488?
No fix has been published for CVE-2026-94488 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-94488 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94488 exists.
Sources
Also known as DEBIAN-CVE-2026-94488, GHSA-58p4-4g24-j8vp.