Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence.

Gazelle 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

No solution given by the vendor.


Workaround

Migrate to Starman version 0.4018 or newer which has fixed the issue. Or apply the patch.

History

Wed, 06 May 2026 17:30:00 +0000

Type Values Removed Values Added
References

Wed, 06 May 2026 15:30:00 +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:N/I:H/A:N'}

ssvc

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


Wed, 06 May 2026 13:00:00 +0000

Type Values Removed Values Added
Description Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle 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 Gazelle versions through 0.49 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: 2026-05-06T16:32:45.619Z

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

Link: CVE-2026-40562

cve-icon Vulnrichment

Updated: 2026-05-06T16:32:45.619Z

cve-icon NVD

Status : Received

Published: 2026-05-06T13:16:09.110

Modified: 2026-05-06T17:16:23.147

Link: CVE-2026-40562

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T16:45:07Z

Weaknesses