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CVE-2026-6608

Estado: AplazadaMedia (5.5)—

A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed.

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-2026-6608",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6608",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-20T14:57:43.886595Z"
        }
      }
    ],
    "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:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "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:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "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:L/VA:N/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": "LOW",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "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": [
            "Arena Side-by-Side View Handler"
          ],
          "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": "2026-04-20T06:16:21.733",
  "references": [
    {
      "url": "https://gist.github.com/YLChen-007/e45039d23e698222d887ee09735d9d36",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://github.com/lm-sys/FastChat/issues/3834",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/submit/792228",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/358243",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/358243/cti",
      "source": "cna@vuldb.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-670"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed."
    }
  ],
  "lastModified": "2026-06-17T11:01:04.430",
  "sourceIdentifier": "cna@vuldb.com"
}