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CVE-2026-90583NVD
Description
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.
CVSS Base Metrics
CVSS v3 (3.1)
MEDIUM 4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C
CVSS v4 (4.0)
MEDIUM 5.3
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
Affected & Patched Versions
| Product | Affected Versions | Patched Version |
|---|---|---|
| kagisearch smallweb | 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf | N/A |
References
- https://vuldb.com/vuln/403168
- https://vuldb.com/vuln/403168/cti
- https://vuldb.com/cve/CVE-2026-90583
- https://vuldb.com/submit/913779
- https://github.com/kagisearch/smallweb/issues/854
- https://github.com/kagisearch/smallweb/commit/00b68144e583f20a6b67e29cf01bc07f57979ffb
- https://github.com/kagisearch/smallweb/