CVE-2026-73276: Erlang OTP

High severity, CVSS 8.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Gracefulness code ignored cases that should be rejected, resulting in possible HTTP Request Smuggling opportunities. This issue affects OTP from OTP 22.2 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 7.1.2 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2.

Affected products

• Erlang OTP: from 22.2, before 27.3.4.17 (fixed in 27.3.4.17); from 28.0, before 28.5.0.6 (fixed in 28.5.0.6); from 29.0, before 29.0.6 (fixed in 29.0.6); from 7.1.2, before 9.3.2.7 (fixed in 9.3.2.7); from 9.4, before 9.6.2.3 (fixed in 9.6.2.3); from 9.7, before 9.7.2 (fixed in 9.7.2)

Published 2026-09-01. Last modified 2026-09-08.