Bug 2526827 (CVE-2026-73812) - CVE-2026-73812 OTP: inets: inets: HTTP Request Smuggling allows bypassing security controls
Summary: CVE-2026-73812 OTP: inets: inets: HTTP Request Smuggling allows bypassing sec...
Keywords:
Status: NEW
Alias: CVE-2026-73812
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-01 15:03 UTC by OSIDB Bzimport
Modified: 2026-09-03 04:57 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-01 15:03:06 UTC 
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.
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