guno1928 alos-http up to 0.0.0-20260617230736-314b6783e195 Path Sanitization core/utils.go sanitizeRequestPath out-of-bounds

Summaryinfo

A vulnerability, which was classified as problematic, was found in guno1928 alos-http up to 0.0.0-20260617230736-314b6783e195. Affected is the function core/utils.go::sanitizeRequestPath of the file core/utils.go of the component Path Sanitization. The manipulation results in out-of-bounds. This vulnerability is identified as CVE-2026-55484. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in guno1928 alos-http up to 0.0.0-20260617230736-314b6783e195. Affected is the function core/utils.go::sanitizeRequestPath of the file core/utils.go of the component Path Sanitization. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. CVE summarizes:

ALOS HTTP is a Linux-first Go web framework and application server built around a custom networking stack. Prior to 0.0.0-20260617230736-314b6783e196, core/utils.go::sanitizeRequestPath calls splitPathQuery on a request path beginning with a question mark and then performs the unchecked p[0] access without checking whether the resulting path is empty. An unauthenticated client can send a malformed request such as a question-mark-only path through h1_plain.go::ParseH1RequestHead, hpack.go::decodeSimpleGetPathHTTPSRequest, hpack.go::observeHeader, or h3_conn.go::handleRequestStream, causing an out-of-bounds panic before core.Recovery() middleware runs and terminating the server process. This issue is fixed in pseudo-version 0.0.0-20260617230736-314b6783e196.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-55484 since 06/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 0.0.0-20260617230736-314b6783e196 eliminates this vulnerability.

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Productinfo

Vendor

• guno1928

Name

• alos-http

Version

• 0.0.0-20260617230736-314b6783e195

Website

• Product: https://github.com/guno1928/alos-http/

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