CVE-2026-73812 Affecting erlang package, versions <1:25.3.2.8+dfsg-1ubuntu4.7


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.52% (42nd percentile)

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  • Snyk IDSNYK-UBUNTU2404-ERLANG-19519233
  • published23 Sept 2026
  • disclosed1 Sept 2026

Introduced: 1 Sep 2026

CVE-2026-73812  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 erlang to version 1:25.3.2.8+dfsg-1ubuntu4.7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream erlang package and not the erlang package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

httpd function check_header/3 rejects duplicate Content-Length (per CVE-2026-23941) but never checks for the TE+CL co-presence that RFC 9112 §6.3 identifies as a probable smuggling attempt. handle_body/3 frames by chunked and silently discards Content-Length. A CL-preferring front-end paired with chunked-preferring inets creates a classic CL.TE front-end/back-end desync.

This issue affects OTP from OTP 17.0 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 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

CVSS Base Scores

version 3.1