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CVE-2026-16634

Estado: AplazadaCrítica (9.8)—

TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99.

The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.

Any caller that passes untrusted TOML to from_toml risks a stack overflow from a deeply-nested document.

TOML::XS version 0.06 or later uses the successor tomlc17 library.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). Recursión incontrolada en TOML causa desbordamiento de pila (DoS en aplicación, T1499.004). En Perl, podría escalar a RCE/privilegios (T1068) según contexto.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (3)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Moddable — XSAIToml — C17AIToml — C99AI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-16634",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-16634",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-27T17:15:36.719810Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/FGasper/p5-TOML-XS",
          "vendor": "FELIPE",
          "product": "TOML::XS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "0.06",
              "versionType": "custom"
            }
          ],
          "packageName": "TOML-XS",
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-07-24T10:16:31.693",
  "references": [
    {
      "url": "https://github.com/cktan/tomlc17",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://github.com/cktan/tomlc99/issues/97",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/FELIPE/TOML-XS-0.06/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://raw.githubusercontent.com/cktan/tomlc99/29076dfd095bbbbd50a3c1b2760d29f4b83e74ac/README.md",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://toml.io/en/v1.0.0",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/07/24/4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/cktan/tomlc99/issues/97",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1104"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99.\n\nThe tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.\n\nAny caller that passes untrusted TOML to from_toml risks a stack overflow from a deeply-nested document.\n\nTOML::XS version 0.06 or later uses the successor tomlc17 library."
    }
  ],
  "lastModified": "2026-07-27T18:16:52.970",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}