{"cve":"CVE-2026-55484","nvd":{"published":"2026-08-28T20:18:27.513","modified":"2026-09-09T21:09:13.080","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-248","CWE-754"],"references":["https://github.com/guno1928/alos-http/commit/314b6783e19698c85ea9d9b197ff52f7f6a3a374","https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj","https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-55484","score":0.00488,"percentile":0.42021,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hr6j-w4mw-g9mj","url":"https://osv.dev/vulnerability/GHSA-hr6j-w4mw-g9mj","summary":"alos-http has unauthenticated remote DoS: malformed path starting with \"?\" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server","modified":"2026-09-02T19:55:34.438739097Z","packages":[{"ecosystem":"Go","name":"github.com/guno1928/alos-http","purl":"pkg:golang/github.com/guno1928/alos-http","ranges":["<0.0.0-20260617230736-314b6783e196"],"fixed":["0.0.0-20260617230736-314b6783e196"]}]},{"id":"GO-2026-6321","url":"https://osv.dev/vulnerability/GO-2026-6321","summary":"alos-http has unauthenticated remote DoS: malformed path starting with \"?\" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server in github.com/guno1928/alos-http","modified":"2026-09-02T19:45:13.191628777Z","packages":[{"ecosystem":"Go","name":"github.com/guno1928/alos-http","purl":"pkg:golang/github.com/guno1928/alos-http","ranges":["<0.0.0-20260617230736-314b6783e196"],"fixed":["0.0.0-20260617230736-314b6783e196"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}