{"id":"CVE-2026-90583","title":"A security flaw has been discovered in kagisearch smallweb up to 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf","summary":"A security flaw has been discovered in kagisearch smallweb up to 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf. The affected element is the function index of the file app/sw.py of the component Query String Rendering. Performing a manipulatio…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cwe":["CWE-79","CWE-94"],"vendor":"kagisearch","product":"smallweb","affected":["smallweb 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf"],"published":"2026-09-13","updated":"2026-09-15","sourceUpdated":"2026-09-15T18:19:37.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90583","references":[{"url":"https://github.com/kagisearch/smallweb/","label":"cna@vuldb.com"},{"url":"https://github.com/kagisearch/smallweb/commit/00b68144e583f20a6b67e29cf01bc07f57979ffb","label":"cna@vuldb.com"},{"url":"https://github.com/kagisearch/smallweb/issues/854","label":"cna@vuldb.com"},{"url":"https://vuldb.com/cve/CVE-2026-90583","label":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/913779","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/403168","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/403168/cti","label":"cna@vuldb.com"},{"url":"https://github.com/kagisearch/smallweb/issues/854","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T17:58:17.238128Z"},"epss":0.00282,"epssPercentile":0.20881,"ingestedAt":"2026-09-14T15:23:07.468Z","slug":"CVE-2026-90583","body":"## Overview\n\nA security flaw has been discovered in kagisearch smallweb up to 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf. The affected element is the function index of the file app/sw.py of the component Query String Rendering. Performing a manipulation of the argument qs results in cross site scripting. The attack is possible to be carried out remotely. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The patch is named 00b68144e583f20a6b67e29cf01bc07f57979ffb. It is recommended to apply a patch to fix this issue. Exploitability requires a raw HTTP request carrying unencoded double-quote characters in the query string - Werkzeug's request.query_string returns the raw request-target, and ordinary browsers percent-encode \" as %22, so the payload only lands via netcat/curl-style raw sockets.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":204377,"id":"CVE-2026-90583","ts":1789497754037,"field":"exploit_available","old":"false","new":"true"}]}