What is CVE-2026-32688?

CVE-2026-32688 is a high-severity vulnerability in Elixir-plug Plug.cowboy, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-27.

How severe is CVE-2026-32688?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Elixir-plug Plug.cowboy

CVE-2026-32688

Allocation of Resources Without Limits or Throttling vulnerability in elixir-plug plug_cowboy allows unauthenticated remote denial of service via atom table exhaustion. Plug.Cowboy.Conn.conn/1 in lib/plug/cowboy/conn.ex calls String.to_at…

EPSS: 0.001 (28.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elixir-plug Plug.cowboy
Elixir-plug Plug_cowboy — versions 2.0.0, 12ecfd024bb179d48b018fecf074e43fe6a19c83

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, vendor-advisory, Vendor Advisory)
6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, Third Party Advisory)
6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, Third Party Advisory)
6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Patch, patch)

Frequently asked questions

What is CVE-2026-32688?: CVE-2026-32688 is a high-severity vulnerability in Elixir-plug Plug.cowboy, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-27.
How severe is CVE-2026-32688?: High severity. CVSS v3 base score is 7.5 out of 10.