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 remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4cca750484 advisory.

    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.

    This package updates Starman to 0.4018 where Transfer-Encoding now takes precedence over Content-Length.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-b94aad33a5 advisory.

    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.

    This package updates Starman to 0.4018 where Transfer-Encoding now takes precedence over Content-Length.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-5bb108e1b7 advisory.

    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.

    This package updates Starman to 0.4018 where Transfer-Encoding now takes precedence over Content-Length.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch 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. (CVE-2026-40560)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
313199	Fedora 42 : perl-Starman (2026-4cca750484)	Nessus	Fedora Local Security Checks	high
313198	Fedora 43 : perl-Starman (2026-b94aad33a5)	Nessus	Fedora Local Security Checks	high
313176	Fedora 44 : perl-Starman (2026-5bb108e1b7)	Nessus	Fedora Local Security Checks	high
310940	Linux Distros Unpatched Vulnerability : CVE-2026-40560	Nessus	Misc.	high

Detections

Analytics

CVE-2026-40560

high

Tenable Plugins

high

high

high

high