Vulnerability-Lookup

GHSA-7VGJ-FWC9-R6GH

Vulnerability from github – Published: 2026-09-04 00:31 – Updated: 2026-09-04 00:31

Details

MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes.

Severity

7.5 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-85442"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T23:17:23Z",
    "severity": "HIGH"
  },
  "details": "MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes.",
  "id": "GHSA-7vgj-fwc9-r6gh",
  "modified": "2026-09-04T00:31:09Z",
  "published": "2026-09-04T00:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85442"
    },
    {
      "type": "WEB",
      "url": "https://github.com/themoos/core-moos/pull/81"
    },
    {
      "type": "WEB",
      "url": "https://github.com/themoos/core-moos/commit/e7ea624a7b7828b47fcd35fc43feec1f5cfbbe21"
    },
    {
      "type": "WEB",
      "url": "https://github.com/themoos/core-moos"
    },
    {
      "type": "WEB",
      "url": "https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSCommPkt.cpp#L99"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-denial-of-service-via-unbounded-packet-allocation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-85442 (GCVE-0-2026-85442)

Vulnerability from cvelistv5 – Published: 2026-09-03 22:38 – Updated: 2026-09-04 18:39

Title

MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation

Summary

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-04 18:39 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/themoos/core-moos/pull/81	issue-trackingpatch
https://github.com/themoos/core-moos/commit/e7ea6…	patch
https://github.com/themoos/core-moos	product
https://github.com/themoos/core-moos/blob/ec9c77c…	technical-description
https://www.vulncheck.com/advisories/moos-core-mo…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
themoos	core-moos	Affected: 0 , ≤ 10.4.0 (custom)

Date Public

2026-09-01 00:00

Credits

Vlatko Kosturjak

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-85442",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-04T18:39:33.152343Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-04T18:39:42.723Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "core-moos",
          "vendor": "themoos",
          "versions": [
            {
              "lessThanOrEqual": "10.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Vlatko Kosturjak"
        }
      ],
      "datePublic": "2026-09-01T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T22:38:32.543Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Pull Request #81",
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/themoos/core-moos/pull/81"
        },
        {
          "name": "Proposed fix commit (pull request not merged)",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/themoos/core-moos/commit/e7ea624a7b7828b47fcd35fc43feec1f5cfbbe21"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/themoos/core-moos"
        },
        {
          "name": "MOOSCommPkt.cpp (verified sink)",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSCommPkt.cpp#L99"
        },
        {
          "name": "VulnCheck Advisory: MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-denial-of-service-via-unbounded-packet-allocation"
        }
      ],
      "title": "MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-85442",
    "datePublished": "2026-09-03T22:38:32.543Z",
    "dateReserved": "2026-09-03T19:50:58.488Z",
    "dateUpdated": "2026-09-04T18:39:42.723Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-7VGJ-FWC9-R6GH

CVE-2026-85442 (GCVE-0-2026-85442)

Tags

Sightings

Nomenclature