miyagawa Starman up to 0.4018 resource consumption

Summaryinfo

A vulnerability was found in miyagawa Starman up to 0.4018. It has been classified as critical. This affects an unknown function. Performing a manipulation results in resource consumption. This vulnerability is identified as CVE-2026-115822. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in miyagawa Starman up to 0.4018. It has been classified as critical. This affects an unknown code block. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. Starman decodes chunked request bodies before calling the application, matching each chunk-size line with `s/^(([0-9a-fA-F]+).*\015\012)//`. A line of hex digits followed by a bare LF and then CRLF never matches, because `.` does not match LF, and each failed attempt backtracks in time quadratic in the length of the hex run. Nothing limits the length of the line. A remote attacker can exhaust worker CPU by sending such requests to any route.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-115822 since 10/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 0.4019 eliminates this vulnerability.

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Productinfo

Vendor

• miyagawa

Name

• Starman

Version

• 0.4018

Website

• Product: https://github.com/miyagawa/Starman/

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