CVE-2026-90583 (GCVE-0-2026-90583)

Vulnerability from cvelistv5 – Published: 2026-09-13 20:00 – Updated: 2026-09-15 17:58 X_Open Source
VLAI
Title
kagisearch smallweb Query String Rendering sw.py index cross site scripting
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 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.
Severity
5.3 (Medium)
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
4.3 (Medium)
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
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 17:58 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
kagisearch smallweb Affected: 0ecb9c48edbf98dc7e934b54fbac43869e64b4cf
    cpe:2.3:a:kagisearch:smallweb:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Customeres (VulDB User)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-90583",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T17:58:17.238128Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-15T17:58:22.697Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/kagisearch/smallweb/issues/854"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:kagisearch:smallweb:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Query String Rendering"
          ],
          "product": "smallweb",
          "vendor": "kagisearch",
          "versions": [
            {
              "status": "affected",
              "version": "0ecb9c48edbf98dc7e934b54fbac43869e64b4cf"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Customeres (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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": [
        {
          "cvssV4_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 5,
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "Cross Site Scripting",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "Code Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T20:00:09.772Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-403168 | kagisearch smallweb Query String Rendering sw.py index cross site scripting",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/403168"
        },
        {
          "name": "VDB-403168 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/403168/cti"
        },
        {
          "name": "CVE-2026-90583 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-90583"
        },
        {
          "name": "Submit #913779 | kagisearch smallweb main Cross Site Scripting",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/913779"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/kagisearch/smallweb/issues/854"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/kagisearch/smallweb/commit/00b68144e583f20a6b67e29cf01bc07f57979ffb"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/kagisearch/smallweb/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-12T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-09-12T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-09-12T19:41:44.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "kagisearch smallweb Query String Rendering sw.py index cross site scripting",
      "x_generator": [
        "VulDB PVTS v202609"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-90583",
    "datePublished": "2026-09-13T20:00:09.772Z",
    "dateReserved": "2026-09-12T17:36:40.109Z",
    "dateUpdated": "2026-09-15T17:58:22.697Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-90583",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-15T17:58:17.238128Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-15T17:58:00.842Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/kagisearch/smallweb/issues/854"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "cpes": [
                "cpe:2.3:a:kagisearch:smallweb:*:*:*:*:*:*:*:*"
              ],
              "modules": [
                "Query String Rendering"
              ],
              "product": "smallweb",
              "vendor": "kagisearch",
              "versions": [
                {
                  "status": "affected",
                  "version": "0ecb9c48edbf98dc7e934b54fbac43869e64b4cf"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "reporter",
              "value": "Customeres (VulDB User)"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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\u0027s 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": [
            {
              "cvssV4_0": {
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "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",
                "version": "4.0"
              }
            },
            {
              "cvssV3_1": {
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "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",
                "version": "3.1"
              }
            },
            {
              "cvssV3_0": {
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C",
                "version": "3.0"
              }
            },
            {
              "cvssV2_0": {
                "baseScore": 5,
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C",
                "version": "2.0"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-79",
                  "description": "Cross Site Scripting",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-94",
                  "description": "Code Injection",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-13T20:00:09.772Z",
            "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
            "shortName": "VulDB"
          },
          "references": [
            {
              "name": "VDB-403168 | kagisearch smallweb Query String Rendering sw.py index cross site scripting",
              "tags": [
                "vdb-entry",
                "technical-description"
              ],
              "url": "https://vuldb.com/vuln/403168"
            },
            {
              "name": "VDB-403168 | CTI Indicators (IOB, IOC, TTP, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/vuln/403168/cti"
            },
            {
              "name": "CVE-2026-90583 | CVE Analysis and Report",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/cve/CVE-2026-90583"
            },
            {
              "name": "Submit #913779 | kagisearch smallweb main Cross Site Scripting",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/submit/913779"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/kagisearch/smallweb/issues/854"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/kagisearch/smallweb/commit/00b68144e583f20a6b67e29cf01bc07f57979ffb"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://github.com/kagisearch/smallweb/"
            }
          ],
          "tags": [
            "x_open-source"
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-09-12T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2026-09-12T02:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-09-12T19:41:44.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "kagisearch smallweb Query String Rendering sw.py index cross site scripting",
          "x_generator": [
            "VulDB PVTS v202609"
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-90583",
        "datePublished": "2026-09-13T20:00:09.772Z",
        "dateReserved": "2026-09-12T17:36:40.109Z",
        "dateUpdated": "2026-09-15T17:58:22.697Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.