HIGH 8.6 NVD

CVE-2026-49864

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 sequ

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.

References

https://github.com/butlerx/wetty/security/advisories/GHSA-p26j-h7wj-r568

Published: 2026-08-13 · Source: NVD · Feed updated: 2026-08-13

This high severity vulnerability with a CVSS score of 8.6 was published on 2026-08-13 via NVD.

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