FKIE_CVE-2026-55168

Vulnerability from fkie_nvd - Published: 2026-08-21 21:17 - Updated: 2026-08-25 17:17
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Summary
Runtipi is a personal homeserver orchestrator. In 4.10.0 and earlier, Runtipi accepts symbolic links from an attacker-controlled backup archive and copies them into live application paths during the backup restore flow. An authenticated attacker can plant user-config/app.env as a symlink to an arbitrary reachable path and then send PUT /api/user-config/demoapp3:_user with attacker-controlled appEnv content. FilesystemService.writeTextFile() follows the planted link, allowing content to be written outside the intended restore and user-config directory boundary with Runtipi process permissions. This issue is fixed in version 4.10.1.
References
security-advisories@github.comhttps://github.com/runtipi/runtipi/commit/df529a211b05f3a0007b209b6c337f8c1942619c
security-advisories@github.comhttps://github.com/runtipi/runtipi/pull/2606
security-advisories@github.comhttps://github.com/runtipi/runtipi/releases/tag/v4.10.1
security-advisories@github.comhttps://github.com/runtipi/runtipi/security/advisories/GHSA-wcrf-g9p9-2wg7
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/runtipi/runtipi/security/advisories/GHSA-wcrf-g9p9-2wg7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "runtipi",
          "vendor": "runtipi",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.10.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Runtipi is a personal homeserver orchestrator. In 4.10.0 and earlier, Runtipi accepts symbolic links from an attacker-controlled backup archive and copies them into live application paths during the backup restore flow. An authenticated attacker can plant user-config/app.env as a symlink to an arbitrary reachable path and then send PUT /api/user-config/demoapp3:_user with attacker-controlled appEnv content. FilesystemService.writeTextFile() follows the planted link, allowing content to be written outside the intended restore and user-config directory boundary with Runtipi process permissions. This issue is fixed in version 4.10.1."
    }
  ],
  "id": "CVE-2026-55168",
  "lastModified": "2026-08-25T17:17:30.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55168",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T17:00:46.475021Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T21:17:00.410",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/runtipi/runtipi/commit/df529a211b05f3a0007b209b6c337f8c1942619c"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/runtipi/runtipi/pull/2606"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/runtipi/runtipi/releases/tag/v4.10.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/runtipi/runtipi/security/advisories/GHSA-wcrf-g9p9-2wg7"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/runtipi/runtipi/security/advisories/GHSA-wcrf-g9p9-2wg7"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        },
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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