CVE-2026-6855

{
  "id": "CVE-2026-6855",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-22T13:16:22.410",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in InstructLab. A local attacker could exploit a path traversal vulnerability in the chat session handler by manipulating the `logs_dir` parameter. This allows the attacker to create new directories and write files to arbitrary locations on the system, potentially leading to unauthorized data modification or disclosure."
    },
    {
      "lang": "es",
      "value": "Se encontró un fallo en InstructLab. Un atacante local podría explotar una vulnerabilidad de salto de ruta en el gestor de sesiones de chat manipulando el parámetro ’logs_dir’. Esto permite al atacante crear nuevos directorios y escribir archivos en ubicaciones arbitrarias del sistema, lo que podría llevar a la modificación o divulgación no autorizada de datos."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-aws-cuda-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-azure-cuda-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-azure-rocm-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-cuda-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-gcp-cuda-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhelai3/bootc-rocm-rhel9",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-23T00:00:00+00:00",
          "id": "CVE-2026-6855",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:redhat:instructlab:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "F16DE2EF-B42B-4D18-B9E4-3114EBBD65B1"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:redhat:enterprise_linux_ai:3.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "531FF57A-65AE-482C-9A43-D1F2ECAD6ED0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-6855",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460013",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    }
  ]
}