CVE catalog

CVE-2026-40560

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 head

[CVE catalog]

Severity: High · CVSS 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: Apr 28, 2026, 11:46:37 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.49% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	starman	sid	`0.4019-1`	fixed
Debian	starman	forky	`0.4018-1`	fixed
Debian	starman	trixie	`0.4018-0+deb13u1`	fixed
Debian	starman	bookworm	`0.4016-1`	vulnerable
Cpe	starman	Not reported	Not reported	vulnerable
Cpe	starman	Not reported	`0.4018`	fixed
Opensuse	perl-Starman	tumbleweed	`0.4018-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	starman	source	sid	`0.4018-1`	not yet assigned	Not reported	[1135229]
Debian	starman	source	forky	`0.4018-1`	not yet assigned	Not reported	[1135229]
Debian	starman	source	trixie	`0.4018-0+deb13u1`	not yet assigned	Not reported	[1135229]
Debian	starman	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1135229]
Cpe	starman	cpe	Not reported	`0.4018`	Not reported	Not reported	Not reported
Opensuse	perl-Starman	rpm	tumbleweed	`0.4018-1.1`	Not reported	OPENSUSE-SU-2026:10757-1	Not reported

[Debian bug #1135229]

Notes

[bookworm] starman: Minor issue; can be fixed via point release

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[starman]Affected
Details (2)
- 0.4016-1 · all · bookworm
  Affected
  nvd · starman · debian · bookworm; nvd · starman · debian · 12
- 0.4016-1 · all · bookworm
  Affected
  nvd · starman · debian · bookworm; nvd · starman · debian · 12

[Debian 13 (Trixie)]

[starman]Fixed
Details (2)
- 0.4018-0+deb13u1 · all · trixie
  Fixed · Fixed: 0.4018-0+deb13u1
  nvd · starman · debian · 13
- 0.4018-0+deb13u1 · all · trixie
  Fixed · Fixed: 0.4018-0+deb13u1
  nvd · starman · debian · 13

[openSUSE Tumbleweed]

[perl-Starman]Fixed
Source package: [perl-Starman]
Details (1)
- 0.4018-1.3 · noarch · tumbleweed
  Fixed · Fixed: 0.4018-1.1
  nvd · perl-Starman · opensuse · tumbleweed

Observed: Oct 23, 2026, 10:26:04 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]