FKIE_CVE-2026-58251

Vulnerability from fkie_nvd - Published: 2026-07-08 20:16 - Updated: 2026-07-09 16:25
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny evaluation could override the plain subject deny result when the queue name itself was not denied. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
References
security-advisories@github.comhttps://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c
security-advisories@github.comhttps://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1
security-advisories@github.comhttps://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d
security-advisories@github.comhttps://github.com/nats-io/nats-server/releases/tag/v2.11.16
security-advisories@github.comhttps://github.com/nats-io/nats-server/releases/tag/v2.12.7
security-advisories@github.comhttps://github.com/nats-io/nats-server/releases/tag/v2.14.0
security-advisories@github.comhttps://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322
Impacted products
Vendor Product Version
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-RC.1, \u003c 2.12.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "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 with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny evaluation could override the plain subject deny result when the queue name itself was not denied. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16."
    }
  ],
  "id": "CVE-2026-58251",
  "lastModified": "2026-07-09T16:25:45.200",
  "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-2026-58251",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T13:40:09.306056Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T20:16:54.630",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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