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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2026-23929

Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-23929
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 09:28 UTC · Revision 1

Source evidence

CVE-2026-23929

core-osv · Original source

Published 18 Aug 2026, 13:17 UTC

Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.

osv:CVE-2026-23929
Complete source record
{
  "id": "1abbc9bc752fab87dda53b8c9f3805965910a5d26cb244057201d548b6257fae",
  "url": "https://osv.dev/vulnerability/CVE-2026-23929",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-23929",
    "summary": "Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.",
    "evidence": "osv:CVE-2026-23929",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-23929",
      "aliases": [
        "CVE-2026-23929"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "type": "GIT",
              "events": [
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                },
                {
                  "introduced": "49955f1fb5c9168a8a24b053f7ade6b3d903143c"
                },
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23929.json",
            "vanir_signatures": [
              {
                "id": "CVE-2026-23929-30a9ca0d",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                "source": "https://github.com/zabbix/zabbix/commit/75bd32d3d61309bf44008b7de9d40d5ba4aeed8c",
                "target": {
                  "file": "src/zabbix_java/src/com/zabbix/gateway/GeneralInformation.java"
                },
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                "signature_type": "Line",
                "signature_version": "v1"
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              },
              {
                "id": "CVE-2026-23929-da87e516",
                "digest": {
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            "vanir_signatures_modified": "2026-10-24T14:37:34Z"
          }
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      ],
      "modified": "2026-10-24T14:37:34.206766733Z",
      "provider": "osv",
      "references": [
        "https://support.zabbix.com/browse/ZBX-28068"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-23929",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443801,
  "published_at": "2026-08-18T13:17:21.17+00:00"
}