{"id":"CVE-2026-55484","state":"PUBLISHED","title":"ALOS HTTP: Unauthenticated remote DoS: malformed path starting with \"?\" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server","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.","publishedAt":"2026-08-28T19:19:19.749Z","updatedAt":"2026-08-28T20:00:26.302Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["guno1928 alos-http"],"affected":[{"vendor":"guno1928","product":"alos-http","versions":[{"version":"< 0.0.0-20260617230736-314b6783e196","status":"affected"}]}],"references":["https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj","https://github.com/guno1928/alos-http/commit/314b6783e19698c85ea9d9b197ff52f7f6a3a374"],"weaknesses":["CWE-248","CWE-754"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55484.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55484","state":"PUBLISHED","datePublished":"2026-08-28T19:19:19.749Z","dateUpdated":"2026-08-28T20:00:26.302Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T22:28:27.061Z"},"containers":{"cna":{"title":"ALOS HTTP: Unauthenticated remote DoS: malformed path starting with \"?\" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"guno1928","product":"alos-http","versions":[{"version":"< 0.0.0-20260617230736-314b6783e196","status":"affected"}]}],"references":[{"url":"https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj","name":"https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/guno1928/alos-http/commit/314b6783e19698c85ea9d9b197ff52f7f6a3a374","name":"https://github.com/guno1928/alos-http/commit/314b6783e19698c85ea9d9b197ff52f7f6a3a374","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","lang":"en","description":"CWE-248: Uncaught Exception","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-754","lang":"en","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T19:19:19.749Z"},"source":{"advisory":"GHSA-hr6j-w4mw-g9mj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/guno1928/alos-http/security/advisories/GHSA-hr6j-w4mw-g9mj","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:00:20.302427Z","id":"CVE-2026-55484","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T20:00:26.302Z"}}]}}}