FKIE_CVE-2026-19264

Vulnerability from fkie_nvd - Published: 2026-08-07 15:17 - Updated: 2026-10-23 20:10
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.
References
4cdc9741-f887-419a-a2fd-acbbd2729276https://gadvisory.org/advisories/PSA-2026-TH12B7
4cdc9741-f887-419a-a2fd-acbbd2729276https://github.com/gitroomhq/postiz-app/commit/7936062
4cdc9741-f887-419a-a2fd-acbbd2729276https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "postiz-app",
          "product": "postiz-app",
          "repo": "https://github.com/gitroomhq/postiz-app",
          "vendor": "gitroomhq",
          "versions": [
            {
              "lessThan": "2.22.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password."
    },
    {
      "lang": "es",
      "value": "Postiz es una herramienta de programaci\u00f3n de redes sociales de c\u00f3digo abierto. La ruta que sirve medios almacenados localmente une segmentos de ruta suministrados por URL al directorio de carga y transmite el archivo sin normalizar la ruta ni confinarla a ese directorio, y la ruta no requiere autenticaci\u00f3n. Los segmentos de puntos sin procesar se colapsan antes del enrutamiento, pero los separadores codificados en URL sobreviven a la coincidencia de ruta y se decodifican solo una vez que llegan al gestor, restaurando la transversalidad en la llamada al sistema de archivos. Un atacante remoto no autenticado puede, por lo tanto, leer cualquier archivo legible por el proceso de la aplicaci\u00f3n, incluido el entorno del proceso, lo que expone el secreto de firma JWT, la cadena de conexi\u00f3n de la base de datos y los secretos de proveedor y facturaci\u00f3n conectados. Debido a que los tokens de sesi\u00f3n se firman con ese secreto y no tienen caducidad, esto permite forjar una sesi\u00f3n no expirante como cualquier usuario, incluido un administrador, sin una contrase\u00f1a."
    }
  ],
  "id": "CVE-2026-19264",
  "lastModified": "2026-10-23T20:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-19264",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-07T17:54:32.053150Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-07T15:17:00.297",
  "references": [
    {
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "url": "https://gadvisory.org/advisories/PSA-2026-TH12B7"
    },
    {
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "url": "https://github.com/gitroomhq/postiz-app/commit/7936062"
    },
    {
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1"
    }
  ],
  "sourceIdentifier": "4cdc9741-f887-419a-a2fd-acbbd2729276",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "type": "Secondary"
    }
  ]
}



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