inets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-Length (CVE-2026-73812) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-73812

inets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-Length

Answer in brief

CVE-2026-73812 records a Unknown severity vulnerability in inets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-Length. The current sources do not mark it as known exploited. The current feed maps Erlang/OTP (generic), Erlang/OTP (generic), Erlang/OTP (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Sep 1, 2026Source checked Sep 1, 2026First seen by HOL Sep 1, 2026Material review Sep 1, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Erlang/OTP (generic), Erlang/OTP (generic), Erlang/OTP (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Erlang/OTPgeneric	>=17.0 <27.3.4.17 \|\| >=28.0 <28.5.0.6 \|\| >=29.0 <29.0.6	27.3.4.17, 28.5.0.6, 29.0.6
Erlang/OTPgeneric	>=5.10 <9.3.2.7 \|\| >=9.4 <9.6.2.3 \|\| >=9.7 <9.7.2	9.3.2.7, 9.6.2.3, 9.7.2
Erlang/OTPgeneric	>=84adefa331c4159d432d22840663c38f155cd4c1 <591dc00dc99dc2a426167a3b5257c0c94bd45e91	591dc00dc99dc2a426167a3b5257c0c94bd45e91

Recommended response

Check inventory. Check lockfiles and deployed manifests for Erlang/OTP, Erlang/OTP, Erlang/OTP.
Review the reported fix. Update Erlang/OTP to 27.3.4.17; Erlang/OTP to 9.3.2.7; Erlang/OTP to 591dc00dc99dc2a426167a3b5257c0c94bd45e91 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 1, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.