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CVE-2026-5760

Estado: AnalizadaCrítica (9.8)—

SGLang's reranking endpoint (/v1/rerank) achieves Remote Code Execution (RCE) when a model file containing a malcious tokenizer.chat_template is loaded, as the Jinja2 chat templates are rendered using an unsandboxed jinja2.Environment().

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.

Vector CVSS AV:N/AC:L/PR:N sin UI:R indica exposición en red sin autenticación (T1190). CWE-94 (ejecución de código) y Jinja2 sin sandbox permiten RCE mediante plantilla maliciosa en tokenizer, resultando en ejecución arbitraria de código (T1059).

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

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (1)

Lmsys — Sglang

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-5760",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5760",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-20T14:20:49.607107Z"
        }
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    "cvssMetricV31": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
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          "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": "cret@cert.org",
      "affectedData": [
        {
          "vendor": "SGLang",
          "product": "SGLang",
          "versions": [
            {
              "status": "affected",
              "version": "8f3097e"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-04-20T14:16:21.680",
  "references": [
    {
      "url": "https://github.com/Stuub/SGLang-0.5.9-RCE",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://github.com/sgl-project/sglang/pull/23660",
      "tags": [
        "Issue Tracking",
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      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.kb.cert.org/vuls/id/915947",
      "tags": [
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  "vulnStatus": "Analyzed",
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      "description": [
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          "lang": "en",
          "value": "CWE-94"
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  "descriptions": [
    {
      "lang": "en",
      "value": "SGLang's reranking endpoint (/v1/rerank) achieves Remote Code Execution (RCE) when a model file containing a malcious tokenizer.chat_template is loaded, as the Jinja2 chat templates are rendered using an unsandboxed jinja2.Environment()."
    }
  ],
  "lastModified": "2026-06-17T10:59:36.640",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "0.5.11"
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          "operator": "OR"
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      ]
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  ],
  "sourceIdentifier": "cret@cert.org"
}