Bug 2463704 (CVE-2026-40560) - CVE-2026-40560 Starman: Starman: HTTP Request Smuggling via improper header precedence
Summary: CVE-2026-40560 Starman: Starman: HTTP Request Smuggling via improper header p...
Keywords:
Status: NEW
Alias: CVE-2026-40560
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: 2463795
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-29 00:01 UTC by OSIDB Bzimport
Modified: 2026-04-29 12:06 UTC (History)
0 users

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Description OSIDB Bzimport 2026-04-29 00:01:28 UTC 
Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence.

Starman incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.

An attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.
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