CVE-2026-105476

Description

Improper link resolution before file access in cPanel allows remote authenticated users to write arbitrary root-owned files and escalate privileges.

Overview

State: PUBLISHED
Assigner (CNA): hackerone
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: no score available from CNA, NVD, or AI yet
CWE(s): CWE-59
Reserved: 2026-10-05
Published: 2026-11-02 21:05 UTC
Last updated: 2026-11-03 04:56 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/105xxx/CVE-2026-105476.json

AI-forensic CVSS estimate

Used only when a CVE has no official CVSS from its CNA or NVD. An LLM estimates the v3.1 base score from the description; a HIGH/CRITICAL estimate promotes the CVE to a Threat.

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European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-115631

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Affected products (1)

Vendor	Product	Versions	Platforms
WebPros	cPanel	`0` (affected), `0` (affected), `0` (affected), `0` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://support.cpanel.net/hc/en-us/articles/44356595655703-Security-CVE-2026-105476-Arbitrary-File-Write-as-Root-in-cPanel-WHM-October-20th-2026

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-105476.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-105476",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-03T04:56:48.971Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "cPanel",
          "vendor": "WebPros",
          "versions": [
            {
              "lessThan": "11.138.0.19",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "11.136.0.51",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "11.134.0.67",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "11.110.0.154",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Boomerang (boomerang_)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper link resolution before file access in cPanel allows remote authenticated users to write arbitrary root-owned files and escalate privileges."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access ('Link Following')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T21:05:16.335Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://support.cpanel.net/hc/en-us/articles/44356595655703-Security-CVE-2026-105476-Arbitrary-File-Write-as-Root-in-cPanel-WHM-October-20th-2026"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-105476",
    "datePublished": "2026-11-02T21:05:16.335Z",
    "dateReserved": "2026-10-05T15:00:00.728Z",
    "dateUpdated": "2026-11-03T04:56:48.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}