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CVE-2026-32884

Estado: AnalizadaMedia (5.9)—

Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.COM and no subject alternative name would bypasses an excludedSubtrees constraint for evil.com because the comparison is case-sensitive. This issue has been patched in version 3.11.0.

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).

Tecnologías afectadas (1)

Botan Project — Botan

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-32884",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-32884",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-31T18:50:34.432173Z"
        }
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
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      "affectedData": [
        {
          "vendor": "randombit",
          "product": "botan",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.11.0"
            }
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  ],
  "published": "2026-03-30T21:17:10.093",
  "references": [
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      "url": "https://github.com/randombit/botan/security/advisories/GHSA-7c3g-7763-ggj5",
      "tags": [
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      "description": [
        {
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          "value": "CWE-295"
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    {
      "lang": "en",
      "value": "Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.COM and no subject alternative name would bypasses an excludedSubtrees constraint for evil.com because the comparison is case-sensitive. This issue has been patched in version 3.11.0."
    },
    {
      "lang": "es",
      "value": "Botan es una biblioteca de criptografía C++. Antes de la versión 3.11.0, durante el procesamiento de una ruta de certificado X.509 utilizando restricciones de nombre que restringen el conjunto de nombres DNS permitidos, si no se define un nombre alternativo del sujeto en el certificado de entidad final, Botan verificaría que el CN estaba permitido por las restricciones de nombre DNS, aunque esta verificación técnicamente no es requerida por el RFC 5280. Sin embargo, esta verificación no tuvo en cuenta la posibilidad de un CN con mayúsculas y minúsculas. Así, un certificado con CN=Sub.EVIL.COM y sin nombre alternativo del sujeto eludiría una restricción de excludedSubtrees para evil.com porque la comparación distingue entre mayúsculas y minúsculas. Este problema ha sido parcheado en la versión 3.11.0."
    }
  ],
  "lastModified": "2026-06-17T10:36:30.417",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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