CVE-2026-31931

{
  "id": "CVE-2026-31931",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-02T14:16:28.587",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4."
    },
    {
      "lang": "es",
      "value": "Suricata es un motor de IDS, IPS y NSM de red. Desde la versión 8.0.0 hasta antes de la versión 8.0.4, el uso de la palabra clave de regla ’tls.alpn’ puede causar que Suricata se bloquee con una desreferencia NULL. Este problema ha sido parcheado en la versión 8.0.4."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "OISF",
          "product": "suricata",
          "versions": [
            {
              "version": ">= 8.0.0, < 8.0.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-02T14:18:13.377669Z",
          "id": "CVE-2026-31931",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "8.0.0",
              "versionEndExcluding": "8.0.4",
              "matchCriteriaId": "F35C5A48-CA30-43B3-9E53-D3E51C862604"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/OISF/suricata/security/advisories/GHSA-gr22-4784-xvw3",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://redmine.openinfosecfoundation.org/issues/8294",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Permissions Required"
      ]
    }
  ]
}