Vulnerability-Lookup

GHSA-9V98-6G37-X9G6

Vulnerability from github – Published: 2026-06-26 21:03 – Updated: 2026-06-26 21:03

Summary

deepstream is vulnerable to prototype pollution

Details

Impact

Prototype pollution in deepstream server v <=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record.

Patches

Yes, upgrade to v10.0.5

Workarounds

Filter out all messages containing the path __proto__, constructor, prototype, before they reach the server's message pipeline

Severity

9.9 (Critical)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@deepstream/server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49252"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-26T21:03:59Z",
    "nvd_published_at": "2026-06-18T21:16:29Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nPrototype pollution in deepstream server v \u003c=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record.\n\n### Patches\nYes, upgrade to v10.0.5\n\n### Workarounds\nFilter out all messages containing the path `__proto__`, `constructor`, `prototype`, **before they reach the server\u0027s message pipeline**",
  "id": "GHSA-9v98-6g37-x9g6",
  "modified": "2026-06-26T21:03:59Z",
  "published": "2026-06-26T21:03:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49252"
    },
    {
      "type": "WEB",
      "url": "https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/deepstreamIO/deepstream.io"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "deepstream is vulnerable to prototype pollution"
}

CVE-2026-49252 (GCVE-0-2026-49252)

Vulnerability from cvelistv5 – Published: 2026-06-18 20:01 – Updated: 2026-06-22 15:11

Title

deepstream is vulnerable to prototype pollution

Summary

deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. Versions prior to 10.0.5 are vulnerable to Prototype Pollution. Exploitation can lead to potential privilege escalation from any authenticated user with write permission to any record. This issue has been fixed in version 10.0.5.

Severity

9.9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-22 15:10 UTC

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7595 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/deepstreamIO/deepstream.io/sec…	x_refsource_CONFIRM
https://github.com/deepstreamIO/deepstream.io/com…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
deepstreamIO	deepstream.io	Affected: < 10.0.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49252",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-22T15:10:20.891417Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-22T15:11:26.795Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "deepstream.io",
          "vendor": "deepstreamIO",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 10.0.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. Versions prior to 10.0.5  are vulnerable to Prototype Pollution. Exploitation can lead to potential privilege escalation from any authenticated user with write permission to any record. This issue has been fixed in version 10.0.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1321",
              "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-18T20:01:31.307Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-9v98-6g37-x9g6"
        },
        {
          "name": "https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/deepstreamIO/deepstream.io/commit/54b8e2958a98df444b5b5d9a66e22872afd84e44"
        }
      ],
      "source": {
        "advisory": "GHSA-9v98-6g37-x9g6",
        "discovery": "UNKNOWN"
      },
      "title": "deepstream is vulnerable to prototype pollution"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49252",
    "datePublished": "2026-06-18T20:01:31.307Z",
    "dateReserved": "2026-05-28T14:33:01.179Z",
    "dateUpdated": "2026-06-22T15:11:26.795Z",
    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

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