Plug Cowboy
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cpe:2.3:a:elixir-plug:plug_cowboy:*:*:*:*:*:*:*:*
part: a version: * update: *
| Vendor | Elixir Plug (7d195009-2637-51b2-a511-e5e4be67f59e) |
|---|---|
| Product | Plug Cowboy (a81985c5-ad78-5fc1-974a-9401b7744df4) |
| Edition | * |
| Language | * |
| Software edition | * |
| Target software | * |
| Target hardware | * |
| Other | * |
| Notes | Imported from purl2cpe mapping |
PURL mappings
| PURL | Source | Last updated |
|---|---|---|
pkg:github/elixir-plug/plug_cowboy |
purl2cpe | 2026-06-01 10:12:41.279744 |
Vulnerability references
| Identifier | cpeApplicability | Submitted | db.gcve.eu details | Rationale |
|---|---|---|---|---|
CVE:CVE-2026-32688 |
vulnerable | 2026-06-08 07:57:18.033105 |
Atom table exhaustion via HTTP/2 :scheme pseudo-header in plug_cowboy
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_atom/1 on the value returned by :cowboy_req.scheme/1. For HTTP/2 connections, cowlib passes the client-supplied :scheme pseudo-header value through verbatim without validation. Each unique value permanently allocates a new entry in the BEAM atom table. Since atoms are never garbage-collected and the atom table has a fixed limit (default 1,048,576), an unauthenticated attacker can exhaust the table by sending HTTP/2 requests with unique :scheme values, causing the Erlang VM to abort with system_limit and taking down the entire node.
This vulnerability does not affect HTTP/1.1, where cowboy derives the scheme from the listener type rather than from a client-supplied header.
This issue affects plug_cowboy: from 2.0.0 before 2.8.1.
Published: 2026-04-27T13:45:35.160Z
Updated: 2026-04-29T17:08:07.227Z |
Imported from gcve-enriched-dumps CVE data |
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