VULNERABILITY INTELLIGENCE
CVE-2026-49864
EPSS probability0.44%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-09-09
Description
wetty provides terminal access in browser over http/https. Prior to version 3.0.4, the wetty client decodes a base64 filename from the file-download escape sequence and interpolates it raw into a Toastify HTML string (`escapeMarkup: false`). Any output the victim renders - a `cat`'d file, a tailed log, an SSH MOTD, a `curl` response - that contains `\x1b[5i...:...\x1b[4i` runs script in the wetty origin and types attacker-chosen keystrokes into the victim's SSH session. Version 3.0.4 fixes the issue.
Weakness classification
- security-advisories@github.com: CWE-79