Bug 2526840 (CVE-2026-66357) - CVE-2026-66357 otp: inets: Erlang/OTP inets: HTTP Request Smuggling via improper header parsing
Summary: CVE-2026-66357 otp: inets: Erlang/OTP inets: HTTP Request Smuggling via impro...
Keywords:
Status: NEW
Alias: CVE-2026-66357
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-01 15:06 UTC by OSIDB Bzimport
Modified: 2026-10-01 14:30 UTC (History)
0 users

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Description OSIDB Bzimport 2026-09-01 15:06:58 UTC 
httpd has never implemented obs-fold (RFC 2616 §2.2 / RFC 7230 §3.2.4 header continuation lines). Every CRLF followed by a non-CRLF octet unconditionally starts a new header. This missing feature became a security concern as the understanding of HTTP request smuggling attacks evolved.

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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