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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Advisories

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Fixes

Solution

Upgrade to version 0.4018


Workaround

No workaround given by the vendor.

History

Wed, 06 May 2026 16:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:miyagawa:starman:*:*:*:*:*:perl:*:*

Wed, 29 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 29 Apr 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Miyagawa
Miyagawa starman
Vendors & Products Miyagawa
Miyagawa starman

Wed, 29 Apr 2026 04:30:00 +0000

Type Values Removed Values Added
References

Wed, 29 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence
Weaknesses CWE-444
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-04-29T19:06:02.932Z

Reserved: 2026-04-14T11:35:53.644Z

Link: CVE-2026-40560

cve-icon Vulnrichment

Updated: 2026-04-29T03:04:48.511Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-29T00:16:03.927

Modified: 2026-05-06T16:35:19.297

Link: CVE-2026-40560

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-29T21:45:20Z

Weaknesses