Vulnerability-Lookup

GHSA-QG37-CWRH-945R

Vulnerability from github – Published: 2026-04-17 21:31 – Updated: 2026-04-17 21:31

Details

Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.

Severity ?

8.1 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-40434"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-940"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-17T20:16:36Z",
    "severity": "HIGH"
  },
  "details": "Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP \npacket injection by an attacker on the same network to alter or disrupt \napplication traffic.",
  "id": "GHSA-qg37-cwrh-945r",
  "modified": "2026-04-17T21:31:47Z",
  "published": "2026-04-17T21:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40434"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json"
    },
    {
      "type": "WEB",
      "url": "https://www.anviz.com/contact-us.html"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-40434 (GCVE-0-2026-40434)

Vulnerability from cvelistv5 – Published: 2026-04-17 19:49 – Updated: 2026-04-17 20:28

Title

Anviz CrossChex Standard Improper Verification of Source of a Communication Channel

Summary

Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CWE

CWE-940

Assigner

icscert

References

URL

Tags

	https://www.anviz.com/contact-us.html
	https://www.cisa.gov/news-events/ics-advisories/i…
	https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

	Vendor	Product	Version
	Anviz	Anviz CrossChex Standard	Affected: All versions

Show details on NVD website

JSON

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  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40434",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T20:27:23.496359Z",
                "version": "2.0.3"
              },
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
          "defaultStatus": "unaffected",
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          "vendor": "Anviz",
          "versions": [
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              "version": "All versions"
            }
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            }
          ],
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
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      },
      "references": [
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          "url": "https://www.anviz.com/contact-us.html"
        },
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          "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03"
        },
        {
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      "title": "Anviz CrossChex Standard Improper Verification of Source of a Communication Channel",
      "workarounds": [
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            {
              "base64": false,
              "type": "text/html",
              "value": "Anviz did not respond to CISA\u0027s attempts to coordinate these \nvulnerabilities. Users should contact Anviz for more information at \nhttps://www.anviz.com/contact-us.html."
            }
          ],
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  "cveMetadata": {
    "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
    "assignerShortName": "icscert",
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    "datePublished": "2026-04-17T19:49:28.099Z",
    "dateReserved": "2026-04-14T15:42:14.096Z",
    "dateUpdated": "2026-04-17T20:28:02.785Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-QG37-CWRH-945R

CVE-2026-40434 (GCVE-0-2026-40434)

Tags

Sightings

Nomenclature