MIYAGAWA Starman up to 0.4017 on Perl Reverse Proxy request smuggling

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in MIYAGAWA Starman up to 0.4017 on Perl. The affected element is an unknown function of the component Reverse Proxy Handler. This manipulation causes request smuggling. This vulnerability is handled as CVE-2026-40560. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in MIYAGAWA Starman up to 0.4017 on Perl. Affected by this vulnerability is an unknown code of the component Reverse Proxy Handler. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect integrity. The summary by CVE is:

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.

The weakness was released by CPANSec as ced205f0805027e9d9c0731f8c40b104220604ed. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-40560 since 04/14/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 310940 (Linux Distros Unpatched Vulnerability : CVE-2026-40560), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.4018 eliminates this vulnerability. Applying the patch ced205f0805027e9d9c0731f8c40b104220604ed is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202604-5700), Tenable (310940) and EUVD (EUVD-2026-26189). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 310940
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-40560

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Starman 0.4018
Patch: ced205f0805027e9d9c0731f8c40b104220604ed

Timelineinfo

04/14/2026 CVE reserved
04/29/2026 +15 days Advisory disclosed
04/29/2026 +0 days VulDB entry created
05/06/2026 +7 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: ced205f0805027e9d9c0731f8c40b104220604ed
Researcher: CPANSec
Status: Confirmed

CVE: CVE-2026-40560 (🔒)
GCVE (CVE): GCVE-0-2026-40560
GCVE (VulDB): GCVE-100-360091
EUVD: 🔒
CNNVD: CNNVD-202604-5700 - Starman 环境问题漏洞

Entryinfo

Created: 04/29/2026 05:57
Updated: 05/06/2026 18:01
Changes: 04/29/2026 05:57 (59), 04/29/2026 08:10 (1), 04/30/2026 04:58 (2), 04/30/2026 15:18 (6), 05/01/2026 19:01 (1), 05/02/2026 22:28 (1), 05/03/2026 16:59 (1), 05/04/2026 23:49 (1), 05/05/2026 18:42 (1), 05/06/2026 18:01 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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