Vulnerability-Lookup

GHSA-HPWF-8G29-85QM

Vulnerability from github – Published: 2026-04-14 00:15 – Updated: 2026-04-15 21:14

Summary

Nest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)

Details

Impact

Attacker sends many small, valid JSON messages in one TCP frame → handleData() recurses once per message; buffer shrinks each call → maxBufferSize is never reached; call stack overflows instead → A ~47 KB payload is sufficient to trigger RangeError

Patches

Fixed in @nestjs/microservices@11.1.19

References

Discovered by https://github.com/hwpark6804-gif

Severity ?

7.5 (High)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 11.1.18"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@nestjs/microservices"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "11.1.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40879"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-14T00:15:09Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nAttacker sends many small, valid JSON messages in one TCP frame\n \u2192 handleData() recurses once per message; buffer shrinks each call\n \u2192 maxBufferSize is never reached; call stack overflows instead\n \u2192 A ~47 KB payload is sufficient to trigger RangeError\n\n### Patches\n\nFixed in `@nestjs/microservices@11.1.19`\n\n### References\n\nDiscovered by https://github.com/hwpark6804-gif",
  "id": "GHSA-hpwf-8g29-85qm",
  "modified": "2026-04-15T21:14:54Z",
  "published": "2026-04-14T00:15:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nestjs/nest"
    }
  ],
  "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"
    }
  ],
  "summary": "Nest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)"
}

CVE-2026-40879 (GCVE-0-2026-40879)

Vulnerability from cvelistv5 – Published: 2026-04-21 19:14 – Updated: 2026-04-21 19:38

Title

Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)

Summary

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.

Severity ?

7.5 (High)


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

CWE

CWE-674 - Uncontrolled Recursion

Assigner

GitHub_M

References

URL

Tags

https://github.com/nestjs/nest/security/advisorie…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	nestjs	nest	Affected: < 11.1.19

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40879",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-21T19:37:57.073705Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-21T19:38:04.805Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nest",
          "vendor": "nestjs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 11.1.19"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19."
        }
      ],
      "metrics": [
        {
          "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-674",
              "description": "CWE-674: Uncontrolled Recursion",
              "lang": "en",
              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-04-21T19:14:17.894Z",
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      },
      "references": [
        {
          "name": "https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nestjs/nest/security/advisories/GHSA-hpwf-8g29-85qm"
        }
      ],
      "source": {
        "advisory": "GHSA-hpwf-8g29-85qm",
        "discovery": "UNKNOWN"
      },
      "title": "Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-40879",
    "datePublished": "2026-04-21T19:14:17.894Z",
    "dateReserved": "2026-04-15T15:57:41.719Z",
    "dateUpdated": "2026-04-21T19:38:04.805Z",
    "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-HPWF-8G29-85QM

Impact

Patches

References

CVE-2026-40879 (GCVE-0-2026-40879)

Tags

Sightings

Nomenclature