Vulnerability-Lookup

CVE-2026-58252 (GCVE-0-2026-58252)

Vulnerability from cvelistv5 – Published: 2026-07-08 19:46 – Updated: 2026-07-09 13:34

Title

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Summary

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:34 UTC

CWE

CWE-285 - Improper Authorization

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/nats-io/nats-server/security/a…	x_refsource_CONFIRM
https://github.com/nats-io/nats-server/commit/8ce…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/a42…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/e61…	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
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: < 2.11.16 Affected: >= 2.12.0-preview.1, < 2.12.7	guessed

Show details on NVD website

JSON

To clipboard

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}

bit-nats-2026-58252

Vulnerability from bitnami_vulndb

Published

2026-07-14 15:47

Modified

2026-09-08 08:34

Summary

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "nats",
        "purl": "pkg:bitnami/nats"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.16"
            },
            {
              "introduced": "2.12.0"
            },
            {
              "fixed": "2.12.7"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-58252"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:nats:nats_server:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.",
  "id": "BIT-nats-2026-58252",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-07-14T15:47:18.064Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58252"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "NATS Server: Subscribe Authz Bypass via Wildcard-Overlap"
}

FKIE_CVE-2026-58252

Vulnerability from fkie_nvd - Published: 2026-07-08 20:16 - Updated: 2026-07-13 15:24

Severity

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

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6	Patch
security-advisories@github.com	https://github.com/nats-io/nats-server/releases/tag/v2.11.16	Release Notes
security-advisories@github.com	https://github.com/nats-io/nats-server/releases/tag/v2.12.7	Release Notes
security-advisories@github.com	https://github.com/nats-io/nats-server/releases/tag/v2.14.0	Release Notes
security-advisories@github.com	https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr	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 2.11.16"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.12.0-preview.1, \u003c 2.12.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "64D69F6E-293C-4D5F-92F6-8479213F7727",
              "versionEndExcluding": "2.11.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEE2D11B-BD56-4479-A5EB-79F352DA68AB",
              "versionEndExcluding": "2.12.7",
              "versionStartIncluding": "2.12.0",
              "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 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16."
    }
  ],
  "id": "CVE-2026-58252",
  "lastModified": "2026-07-13T15:24:56.357",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58252",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T13:34:18.644909Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T20:16:54.793",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

MSRC_CVE-2026-58252

Vulnerability from csaf_microsoft - Published: 2026-07-11 01:08 - Updated: 2026-07-15 01:41

Summary

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

Scope

1 vulnerability in this advisory, including CVE-2026-58252.

CVE-2026-58252

6.5 (Medium)


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

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

UBUNTU-CVE-2026-58252 (CVE-2026-58252)

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

Details

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-58252	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-58252	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 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.",
  "id": "UBUNTU-CVE-2026-58252",
  "modified": "2026-07-15T17:53:45Z",
  "published": "2026-07-08T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58252"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-58252"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-58252"
  ]
}

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.

Action not permitted

CVE-2026-58252 (GCVE-0-2026-58252)

bit-nats-2026-58252

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-58252

MSRC_CVE-2026-58252

UBUNTU-CVE-2026-58252 (CVE-2026-58252)

Tags

Sightings

Nomenclature

Related by attack behaviour