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gun

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HTTP/1.1, HTTP/2 and Websocket client for Erlang/OTP.

Security advisory: This version has known vulnerabilities. View advisories
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94 Dependants
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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-2026-43973 CVE-2026-43973 GHSA-r53j-fjj5-mv77

gun HTTP/1.1 response buffer has no size limit allowing server-controlled memory exhaustion

June 08, 2026
CVSS
?
8.7 / 10.0 High
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

Affected Versions

>= 1.0.0 and < 2.4.0
EEF-CVE-2026-43974 CVE-2026-43974 GHSA-2j82-37xg-f9wp

gun HTTP/1.1 client accepts unsolicited 101 Switching Protocols response allowing server-driven protocol hijack and OOM

June 08, 2026
CVSS
?
8.7 / 10.0 High
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

Affected Versions

>= 2.0.0 and < 2.4.0
EEF-CVE-2026-43972 CVE-2026-43972 GHSA-36w4-95hv-5vwg

gun HTTP/2 PUSH_PROMISE authority not validated against connection origin allows cross-origin cookie injection

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:L/VA:N/SC:L/SI:L/SA:N

Affected Versions

>= 2.0.0 and < 2.4.0

Checksum

Dependency Config

mix.exs

rebar.config

Gleam

erlang.mk

Package Details

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Last Updated

Jul 28, 2026

License

ISC

Build Tools

make rebar3

Publisher

essen essen

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