CVE-2026-90583 PUBLISHED

kagisearch smallweb Query String Rendering sw.py index cross site scripting

Assigner: VulDB
Reserved: 12.09.2026 Published: 13.09.2026 Updated: 13.09.2026

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 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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X
CVSS Score: 5.3

Product Status

Vendor kagisearch
Product smallweb
Versions
  • Version 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf is affected

Credits

  • Customeres (VulDB User) reporter

References

Problem Types

  • Cross Site Scripting CWE
  • Code Injection CWE