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CVE-2026-67201

Estado: AplazadaAlta (7.7)—

V through 0.5.2, fixed in commit 85859f0, contains a server-side request forgery (SSRF) bypass vulnerability that allows attackers to circumvent host-based allowlists by exploiting a parser differential between net.urllib and net.http. Attackers can craft a URL containing a backslash in the authority section such that net.urllib.parse() extracts the trusted host for allowlist validation while net.http.get() normalizes the backslash and connects to the internal host, enabling access to internal network services that the allowlist was intended to block.

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.

SSRF que eludir controles de allowlist en urllib/http de Go permite proxying de solicitudes a servicios internos (T1090) y acceso a datos internos (T1005). AV:N/PR:N/UI:N indica explotación remota sin autenticación.

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 ScanningSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (2)

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

Golang — NETAIGolang — UrllibAI

CWE

Referencias

JSON original (NVD)

Mostrar
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          "options": [
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              "automatable": "yes"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-07-29T18:57:16.810884Z"
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          "integrityImpact": "NONE",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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  "affected": [
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      "affectedData": [
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          "repo": "https://github.com/vlang/v",
          "vendor": "vlang",
          "product": "v",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "0.5.2"
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  "published": "2026-07-29T19:16:51.330",
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      "url": "https://github.com/vlang/v/commit/85859f0f3498d4091b38009c45ed390a97eeedc2",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://github.com/vlang/v/issues/27945",
      "source": "disclosure@vulncheck.com"
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      "url": "https://github.com/vlang/v/pull/27947",
      "source": "disclosure@vulncheck.com"
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    {
      "lang": "en",
      "value": "V through 0.5.2, fixed in commit 85859f0, contains a server-side request forgery (SSRF) bypass vulnerability that allows attackers to circumvent host-based allowlists by exploiting a parser differential between net.urllib and net.http. Attackers can craft a URL containing a backslash in the authority section such that net.urllib.parse() extracts the trusted host for allowlist validation while net.http.get() normalizes the backslash and connects to the internal host, enabling access to internal network services that the allowlist was intended to block."
    }
  ],
  "lastModified": "2026-07-30T20:16:05.187",
  "sourceIdentifier": "disclosure@vulncheck.com"
}