Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-07-14 15:47

Modified

2026-07-14 16:10

Summary

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

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.

JSON

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{
  "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": "2026-07-14T16:10:26.025Z",
  "published": "2026-07-14T15:47:18.064Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
    },
    {
      "type": "WEB",
      "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"
}

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

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 (v2.0.3)

CWE

CWE-285 - Improper Authorization

Assigner

GitHub_M

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
nats-io	nats-server	Affected: < 2.11.16 Affected: >= 2.12.0-preview.1, < 2.12.7

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-58252",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T13:34:18.644909Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T13:34:28.023Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285: Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T19:46:54.572Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr"
        },
        {
          "name": "https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b"
        },
        {
          "name": "https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854"
        },
        {
          "name": "https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6"
        },
        {
          "name": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
        },
        {
          "name": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
        },
        {
          "name": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
        }
      ],
      "source": {
        "advisory": "GHSA-wh7g-5m82-pmhr",
        "discovery": "UNKNOWN"
      },
      "title": "NATS Server: Subscribe Authz Bypass via Wildcard-Overlap"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-58252",
    "datePublished": "2026-07-08T19:46:10.380Z",
    "dateReserved": "2026-06-29T21:54:30.330Z",
    "dateUpdated": "2026-07-09T13:34:28.023Z",
    "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.

Action not permitted

Vulnerability from bitnami_vulndb

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

Tags

Sightings

Nomenclature