Allocation of Resources Without Limits or Throttling in Erlang OTP - CVE-2026-70399
Published: September 2, 2026
Vulnerability identifier: #VU146828
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-70399
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the inets httpd server when accepting simultaneous connections. A remote attacker can open a large number of connections and keep them open to cause a denial of service.
Only servers using the default configuration without an explicitly set max_clients value are vulnerable, and no valid request or user interaction is required.
Affected software
Erlang OTP
How to mitigate CVE-2026-70399
Install security update from vendor's website.
Erlang OTP - addressed in versions 17.0, 27.3.4.17, 28.5.0.6, 29.0.6