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CVE-2026-40560

CVE-2026-40560 · Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • starman

    Versions
    • ≥ 0, < 0.4018: Affected (custom)

    Update to 0.4018

  • starman Debian:12

    Versions
    • 0.4016-1
    • 0.4017-1
    • 0.4018-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Debian:13

    Versions
    • 0.4017-1
    Affected ranges
    • ECOSYSTEM: < 0.4018-0+deb13u1

    Update to 0.4018-0+deb13u1

  • starman Debian:14

    Versions
    • 0.4017-1
    Affected ranges
    • ECOSYSTEM: < 0.4018-1

    Update to 0.4018-1

  • starman Ubuntu:16.04:LTS

    Versions
    • 0.4014-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:18.04:LTS

    Versions
    • 0.4014-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:20.04:LTS

    Versions
    • 0.4014-3
    • 0.4015-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:22.04:LTS

    Versions
    • 0.4015-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:24.04:LTS

    Versions
    • 0.4016-1
    • 0.4017-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:25.10

    Versions
    • 0.4017-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:26.10

    Versions
    • 0.4017-1build1
    • 0.4018-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • starman Ubuntu:26.04:LTS

    Versions
    • 0.4017-1
    • 0.4017-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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