Packages

cowboy

2.19.0
2.19.0 2.18.0 2.17.0 2.16.1 2.16.0 2.15.0 2.14.2 2.14.1 2.14.0 2.13.0 2.12.0 2.11.0 2.10.0 2.9.0 2.8.0 2.7.0 2.6.3 2.6.2 retired 2.6.1 2.6.0 2.5.0 2.4.0 2.3.0 2.2.2 2.2.1 2.2.0 2.1.0 2.0.0 1.1.2 1.1.1 1.1.0 1.0.4 1.0.3 1.0.2 1.0.1 1.0.0

Small, fast, modern HTTP server.

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36 Versions
2 Dependencies
278 Dependants
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EEF-CVE-2026-65624 CVE-2026-65624

Cowboy HTTP/1.1 max_headers Bypass via Duplicate Header Names Enables Memory Exhaustion

July 28, 2026
CVSS
?
6.9 / 10.0 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected Versions

>= 2.0.0-pre.4 and < 2.18.0
GHSA-w4f7-4cxr-rv3c CVE-2026-43966 EEF-CVE-2026-43966

cowboy and gun affected by an HTTP Request/Response Splitting vulnerability

June 08, 2026
CVSS
?
6.3 / 10.0 Medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

Affected Versions

< 2.16.0
EEF-CVE-2026-8466 CVE-2026-8466 GHSA-jfc2-q6qh-g5x8

Unbounded buffer accumulation in multipart header parsing causes denial of service in cowboy

May 13, 2026
CVSS
?
8.2 / 10.0 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Versions

>= 2.0.0 and < 2.15.0

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Dependency Config

mix.exs

rebar.config

Gleam

erlang.mk

Package Details

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Last Updated

Sep 08, 2026

License

ISC

Build Tools

make rebar3

Publisher

essen essen

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