CVE-2026-56018

{
  "id": "CVE-2026-56018",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "published": "2026-06-29T20:17:39.680",
  "lastModified": "2026-10-25T21:10:00.770",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth.\n\nIn JsMinify (XS.xs) the cleanup frees only the NodeSet structures and never the per-token contents buffers allocated in JsSetNodeContents; JsDiscardNode unlinks nodes without freeing their contents. Each token's contents buffer is therefore leaked on every call, and the two early returns taken when the node list is empty leak the whole NodeSet.\n\nA long-lived process that minifies repeatedly, such as an asset pipeline or a server-side minifier endpoint, grows in memory without bound until it exhausts available memory and is killed, causing denial of service."
    },
    {
      "lang": "es",
      "value": "Las versiones de javascript_disabled: :Minifier::XS anteriores a la 0.16 para Perl fugan memoria en cada llamada a minify(), permitiendo un crecimiento de memoria ilimitado.\n\nEn JsMinify (XS.xs) la limpieza libera solo las estructuras NodeSet y nunca los búferes de contenido por token asignados en JsSetNodeContents; JsDiscardNode desvincula nodos sin liberar su contenido. El búfer de contenido de cada token, por lo tanto, se fuga en cada llamada, y los dos retornos anticipados que se toman cuando la lista de nodos está vacía fugan todo el NodeSet.\n\nUn proceso de larga duración que minimiza repetidamente, como una tubería de activos o un punto final de minimizador del lado del servidor, crece en memoria sin límites hasta que agota la memoria disponible y es terminado, causando denegación de servicio."
    }
  ],
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "vendor": "GTERMARS",
          "product": "JavaScript::Minifier::XS",
          "defaultStatus": "unaffected",
          "collectionURL": "https://cpan.org/modules",
          "packageName": "JavaScript-Minifier-XS",
          "programFiles": [
            "XS.xs"
          ],
          "programRoutines": [
            {
              "name": "JsMinify"
            }
          ],
          "repo": "https://github.com/bleargh45/JavaScript-Minifier-XS",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.16",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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": "2026-06-29T20:52:50.642184Z",
          "id": "CVE-2026-56018",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/bleargh45/JavaScript-Minifier-XS/issues/10",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/GTERMARS/JavaScript-Minifier-XS-0.16/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/06/29/17",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}