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System.Security.Cryptography.Xml, system.security.cryptography.xml — security advisory

Type: advisorySources: OSVAdvisory ID: ECHO-08ee-db76-1049

This notice tracks CVE-2026-26171 for System.Security.Cryptography.Xml, system.security.cryptography.xml. Fixed versions are listed in the package details.

Products
System.Security.Cryptography.Xml, system.security.cryptography.xml
Affected versions
Not specified
Fixed versions
8.0.0+echo.1, 8.0.3
CVEs
CVE-2026-26171
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 16:42 UTC · Revision 1

Source evidence

ECHO-08ee-db76-1049

core-osv · Original source

Published 17 Sept 2026, 08:05 UTC

ECHO-08ee-db76-1049

osv:ECHO-08ee-db76-1049

system.security.cryptography.xml

Fixed versions: 8.0.3

System.Security.Cryptography.Xml

Fixed versions: 8.0.0+echo.1

Complete source record
{
  "id": "a3ff6d3ddb9fe25bbd4bd14446046645fc7df75ffe88c698e4148e12b8523d3c",
  "url": "https://osv.dev/vulnerability/ECHO-08ee-db76-1049",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-08ee-db76-1049",
    "summary": "ECHO-08ee-db76-1049",
    "evidence": "osv:ECHO-08ee-db76-1049",
    "products": [
      {
        "name": {
          "value": "system.security.cryptography.xml",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.0.3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "System.Security.Cryptography.Xml",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.0.0+echo.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-08ee-db76-1049",
      "aliases": [
        "ECHO-08ee-db76-1049"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.0.3"
                }
              ]
            }
          ],
          "package": {
            "name": "system.security.cryptography.xml",
            "purl": "pkg:nuget/system.security.cryptography.xml",
            "ecosystem": "Echo:NuGet"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-08ee-db76-1049.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.0.0+echo.1"
                }
              ]
            }
          ],
          "package": {
            "name": "System.Security.Cryptography.Xml",
            "purl": "pkg:nuget/System.Security.Cryptography.Xml",
            "ecosystem": "Echo:NuGet"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-08ee-db76-1049.json"
          }
        }
      ],
      "modified": "2026-10-22T00:45:07.691052029Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-26171",
        "GHSA-w3x6-4m5h-cxqf"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-26171",
        "https://github.com/advisories/GHSA-w3x6-4m5h-cxqf"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-26171",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 401222,
  "published_at": "2026-09-17T08:05:27.486+00:00"
}