{"id":"CVE-2026-55484","summary":"ALOS HTTP: Unauthenticated remote DoS: malformed path starting with \"?\" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server","details":"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.","aliases":["GHSA-hr6j-w4mw-g9mj","GO-2026-6321"],"modified":"2026-09-02T19:55:34.438739097Z","published":"2026-08-28T19:19:19.749Z","database_specific":{"cwe_ids":["CWE-248","CWE-754"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55484.json","unresolved_ranges":[{"extracted_events":[{"fixed":"0.0.0-20260617230736-314b6783e196"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"fixed":"h1_plain.go"},{"fixed":"core.Recovery"}],"source":"DESCRIPTION"}],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55484.json"},{"type":"ADVISORY","url":"https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55484"},{"type":"FIX","url":"https://github.com/guno1928/alos-http/commit/314b6783e19698c85ea9d9b197ff52f7f6a3a374"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/guno1928/alos-http","events":[{"introduced":"0"},{"fixed":"314b6783e19698c85ea9d9b197ff52f7f6a3a374"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55484.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}