Allocation of Resources Without Limits or Throttling in Erlang OTP - CVE-2026-55951
Published: September 2, 2026
Vulnerability identifier: #VU146842
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-2026-55951
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 httpc HTTP client when processing HTTP response headers from a server. A remote attacker can send an HTTP response with an arbitrarily large number of headers or very large header values to cause a denial of service.
This affects applications using httpc:request/4,5 to connect to untrusted servers.
Affected software
Erlang OTP
How to mitigate CVE-2026-55951
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