Vulnerability-Lookup

CVE-2026-58213 (GCVE-0-2026-58213)

Vulnerability from cvelistv5 – Published: 2026-07-08 19:52 – Updated: 2026-07-09 13:33

Title

NATS Server: MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection

Summary

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:32 UTC

CWE

CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8035 records in the last 180 days details

References

8 references

URL	Tags
https://github.com/nats-io/nats-server/security/a…	x_refsource_CONFIRM
https://github.com/nats-io/nats-server/pull/8163	x_refsource_MISC
https://github.com/nats-io/nats-server/pull/8164	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/366…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/64e…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/f14…	x_refsource_MISC
https://github.com/nats-io/nats-server/releases/t…	x_refsource_MISC
https://github.com/nats-io/nats-server/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
nats-io	nats-server	Affected: < 2.12.9 Affected: >= 2.14.0-RC.1, < 2.14.1	guessed

Show details on NVD website

JSON

To clipboard

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}

bit-nats-2026-58213

Vulnerability from bitnami_vulndb

Published

2026-07-14 15:47

Modified

2026-09-29 09:14

Summary

NATS Server: MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "nats",
        "purl": "pkg:bitnami/nats"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12.9"
            },
            {
              "introduced": "2.14.0"
            },
            {
              "fixed": "2.14.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-58213"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:nats:nats_server:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:nats:nats_server:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.",
  "id": "BIT-nats-2026-58213",
  "modified": "2026-09-29T09:14:51.928Z",
  "published": "2026-07-14T15:47:13.837Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/pull/8163"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/pull/8164"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.9"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58213"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "NATS Server: MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection"
}

FKIE_CVE-2026-58213

Vulnerability from fkie_nvd - Published: 2026-07-08 20:16 - Updated: 2026-10-25 17:10

Severity

7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/pull/8163	Issue Tracking, Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/pull/8164	Issue Tracking, Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/releases/tag/v2.12.9	Release Notes
security-advisories@github.com	https://github.com/nats-io/nats-server/releases/tag/v2.14.1	Release Notes
security-advisories@github.com	https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f	Vendor Advisory

Impacted products

	Vendor	Product	Version
	linuxfoundation	nats-server	*
	linuxfoundation	nats-server	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nats-server",
          "vendor": "nats-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.12.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.14.0-RC.1, \u003c 2.14.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0651D3C8-4F2C-4FEF-B264-45666C245161",
              "versionEndExcluding": "2.12.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "44BD65FC-1D42-479F-9289-BF14FED5A7E7",
              "versionEndExcluding": "2.14.1",
              "versionStartIncluding": "2.14.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9."
    },
    {
      "lang": "es",
      "value": "NATS Server es un servidor de alto rendimiento para NATS.io, el sistema de mensajer\u00eda nativo de la nube y del borde. Antes de 2.14.1 y 2.12.9, un cliente MQTT pod\u00eda incluir caracteres de control de protocolo en filtros de suscripci\u00f3n que luego eran reenviados como datos del protocolo NATS a conexiones de ruta o de nodo hoja, corrompiendo el flujo del protocolo reenviado y permitiendo la inyecci\u00f3n de operaciones de protocolo NATS no intencionadas. Este problema est\u00e1 solucionado en las versiones 2.14.1 y 2.12.9."
    }
  ],
  "id": "CVE-2026-58213",
  "lastModified": "2026-10-25T17:10:00.197",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58213",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T13:32:57.416842Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T20:16:54.180",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/pull/8163"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/pull/8164"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

MSRC_CVE-2026-58213

Vulnerability from csaf_microsoft - Published: 2026-10-22 01:16 - Updated: 2026-10-22 01:16

Summary

NATS Server: MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection

Scope

1 vulnerability in this advisory, including CVE-2026-58213.

CVE-2026-58213

Under investigation: 1 product

Open the full advisory

RHSA-2026:36016

Vulnerability from csaf_redhat - Published: 2026-07-06 18:33 - Updated: 2026-09-06 04:58

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2026-58213.

CVE-2026-58213

A flaw was found in NATS Server. An authenticated MQTT client could exploit this by embedding protocol control characters within subscription filters. These characters would then be forwarded as NATS protocol data to route or leafnode connections, leading to the corruption of the protocol stream. This corruption allows for the injection of unintended NATS protocol operations, which could result in information disclosure and data integrity issues.

7.1 (High)


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

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:36016

Open the full advisory

RHSA-2026:36017

Vulnerability from csaf_redhat - Published: 2026-07-06 18:33 - Updated: 2026-09-07 23:52

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2026-58213.

CVE-2026-58213

7.1 (High)


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

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:36017

Open the full advisory

UBUNTU-CVE-2026-58213 (CVE-2026-58213)

Vulnerability from osv_ubuntu – Published: 2026-07-08 20:16 – Updated: 2026-07-15 17:53 – Source website

Details

Severity

7.1 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-58213	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-58213	REPORT
	https://github.com/nats-io/nats-server/security/a…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-nats-io-nats-server-dev",
            "binary_version": "2.10.7-1ubuntu0.3"
          },
          {
            "binary_name": "nats-server",
            "binary_version": "2.10.7-1ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nats-server",
        "purl": "pkg:deb/ubuntu/nats-server@2.10.7-1ubuntu0.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.9.19-1build1",
        "2.10.3-1",
        "2.10.4-1",
        "2.10.7-1",
        "2.10.7-1ubuntu0.1",
        "2.10.7-1ubuntu0.2",
        "2.10.7-1ubuntu0.3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-nats-io-nats-server-dev",
            "binary_version": "2.10.27-1"
          },
          {
            "binary_name": "nats-server",
            "binary_version": "2.10.27-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nats-server",
        "purl": "pkg:deb/ubuntu/nats-server@2.10.27-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.10.24-1",
        "2.10.27-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-nats-io-nats-server-dev",
            "binary_version": "2.10.27-1ubuntu0.26.04.1~esm1"
          },
          {
            "binary_name": "nats-server",
            "binary_version": "2.10.27-1ubuntu0.26.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "nats-server",
        "purl": "pkg:deb/ubuntu/nats-server@2.10.27-1ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.10.27-1",
        "2.10.27-1build1",
        "2.10.27-1ubuntu0.26.04.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.",
  "id": "UBUNTU-CVE-2026-58213",
  "modified": "2026-07-15T17:53:45Z",
  "published": "2026-07-08T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58213"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-58213"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-58213"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Action not permitted

CVE-2026-58213 (GCVE-0-2026-58213)

bit-nats-2026-58213

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-58213

MSRC_CVE-2026-58213

RHSA-2026:36016

RHSA-2026:36017

UBUNTU-CVE-2026-58213 (CVE-2026-58213)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour