Allocation of Resources Without Limits or Throttling in Erlang OTP - CVE-2026-68956
Published: October 14, 2026
Vulnerability identifier: #VU155787
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68956
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to resource allocation without limits in the Erlang/OTP SSH daemon's session channel handling when opening idle session channels that are not counted against max_channels. A remote user can open a large number of session channels without starting a shell, command, or subsystem to cause a denial of service.
A single SSH connection is sufficient for exploitation.
Affected software
Erlang OTP
How to mitigate CVE-2026-68956
Install security update from vendor's website.
Erlang OTP - addressed in versions 27.3.4.18, 28.5.0.7, 29.1.1