CVE-2026-73226
Electerm WebSocket `upgrade-func` and `fs` handlers allow arbitrary method/function invocation due to missing method-name allowlist
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.15.186, electerm allows an authenticated WebSocket client to invoke unintended internal functions through client-controlled func values in upgrade-func in src/app/server/dispatch-center.js and handleFs in src/app/server/fs.js, exposing Upgrade and fsExport methods that can execute commands, open files, mutate the filesystem, or terminate the process. This issue is fixed in version 3.15.186.
| CWE | CWE-913 |
| Vendor | electerm |
| Product | electerm |
| Published | Aug 11, 2026 |
| Last Updated | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
electerm / electerm
< 3.15.186
References
github.com: https://github.com/electerm/electerm/security/advisories/GHSA-8chw-jwc5-8587 github.com: https://github.com/electerm/electerm/pull/4447 github.com: https://github.com/electerm/electerm/commit/b1729eb67a4cd9cf1182de69dc2c8e051931740f github.com: https://github.com/electerm/electerm/releases/tag/v3.15.186