CVE-2026-40560

Published: Apr 29, 2026 Last Modified: Apr 30, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0003
Percentile
0,1th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Non-Repudiation Access Control
Potential Impacts:
Unexpected State Hide Activities Bypass Protection Mechanism
Applicable Platforms
Technologies: Web Based, Web Server
View CWE Details
https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3
https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3
https://github.com/miyagawa/Starman/commit/ced205f0805027e9…
https://github.com/miyagawa/Starman/commit/ced205f0805027e9d9c0731f8c40b1042206…
https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes
https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes
http://www.openwall.com/lists/oss-security/2026/04/29/1
http://www.openwall.com/lists/oss-security/2026/04/29/1