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CVE-2026-6607

Estado: AplazadaMedia (5.5)—

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function api_generate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in api_generate of base_model_worker.py and did miss other entry points.

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)

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

Lmsys — FastchatAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-6607",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6607",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-20T11:36:33.963840Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.5,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "cna@vuldb.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:lm-sys:fastchat:*:*:*:*:*:*:*:*"
          ],
          "vendor": "lm-sys",
          "modules": [
            "Worker API Endpoint"
          ],
          "product": "fastchat",
          "versions": [
            {
              "status": "affected",
              "version": "0.2.0"
            },
            {
              "status": "affected",
              "version": "0.2.1"
            },
            {
              "status": "affected",
              "version": "0.2.2"
            },
            {
              "status": "affected",
              "version": "0.2.3"
            },
            {
              "status": "affected",
              "version": "0.2.4"
            },
            {
              "status": "affected",
              "version": "0.2.5"
            },
            {
              "status": "affected",
              "version": "0.2.6"
            },
            {
              "status": "affected",
              "version": "0.2.7"
            },
            {
              "status": "affected",
              "version": "0.2.8"
            },
            {
              "status": "affected",
              "version": "0.2.9"
            },
            {
              "status": "affected",
              "version": "0.2.10"
            },
            {
              "status": "affected",
              "version": "0.2.11"
            },
            {
              "status": "affected",
              "version": "0.2.12"
            },
            {
              "status": "affected",
              "version": "0.2.13"
            },
            {
              "status": "affected",
              "version": "0.2.14"
            },
            {
              "status": "affected",
              "version": "0.2.15"
            },
            {
              "status": "affected",
              "version": "0.2.16"
            },
            {
              "status": "affected",
              "version": "0.2.17"
            },
            {
              "status": "affected",
              "version": "0.2.18"
            },
            {
              "status": "affected",
              "version": "0.2.19"
            },
            {
              "status": "affected",
              "version": "0.2.20"
            },
            {
              "status": "affected",
              "version": "0.2.21"
            },
            {
              "status": "affected",
              "version": "0.2.22"
            },
            {
              "status": "affected",
              "version": "0.2.23"
            },
            {
              "status": "affected",
              "version": "0.2.24"
            },
            {
              "status": "affected",
              "version": "0.2.25"
            },
            {
              "status": "affected",
              "version": "0.2.26"
            },
            {
              "status": "affected",
              "version": "0.2.27"
            },
            {
              "status": "affected",
              "version": "0.2.28"
            },
            {
              "status": "affected",
              "version": "0.2.29"
            },
            {
              "status": "affected",
              "version": "0.2.30"
            },
            {
              "status": "affected",
              "version": "0.2.31"
            },
            {
              "status": "affected",
              "version": "0.2.32"
            },
            {
              "status": "affected",
              "version": "0.2.33"
            },
            {
              "status": "affected",
              "version": "0.2.34"
            },
            {
              "status": "affected",
              "version": "0.2.35"
            },
            {
              "status": "affected",
              "version": "0.2.36"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-04-20T05:16:16.190",
  "references": [
    {
      "url": "https://gist.github.com/YLChen-007/87216a2d97a882d619e11dc67cd473b5",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/commit/c9e84b89c91d45191dc24466888de526fa04cf33",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/issues/3833",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/pull/3835",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/submit/792227",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/358242",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/358242/cti",
      "source": "cna@vuldb.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-404"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function api_generate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in api_generate of base_model_worker.py and did miss other entry points."
    }
  ],
  "lastModified": "2026-06-17T11:01:04.280",
  "sourceIdentifier": "cna@vuldb.com"
}