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CVE-2026-73226

Electerm WebSocket `upgrade-func` and `fs` handlers allow arbitrary method/function invocation due to missing method-name allowlist

Published: Aug 11, 2026Updated: Aug 11, 2026 Sources: CVE List NVDCWE-913
8.8HIGH
NVD MITRE
EPSS Score
0.4%
Top 68.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-913

Affected Products

electerm
commercial
electermOn-prem
Communications / email-server-client

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
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References

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
and 1 more references View all →

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