CVE-2026-49864 (GCVE-0-2026-49864)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:10 – Updated: 2026-08-18 01:35
VLAI
EPSS
VEX
Title
wetty vulnerable to DOM XSS via file-download filename
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 01:35 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/butlerx/wetty/security/advisor… | x_refsource_CONFIRM |
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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