FKIE_CVE-2026-40168

Vulnerability from fkie_nvd - Published: 2026-04-10 20:16 - Updated: 2026-10-26 21:10
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
References
security-advisories@github.comhttps://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06Patch
security-advisories@github.comhttps://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5Product, Release Notes
security-advisories@github.comhttps://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6wwExploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6wwExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
gitroom postiz *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "postiz-app",
          "vendor": "gitroomhq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.21.5"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F8244F9F-08C4-4279-883D-470D3C7145F8",
              "versionEndExcluding": "2.21.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource."
    },
    {
      "lang": "es",
      "value": "Postiz es una herramienta de programaci\u00f3n de redes sociales con IA. Antes de la versi\u00f3n 2.21.5, el endpoint /api/public/stream es vulnerable a SSRF. Aunque la aplicaci\u00f3n valida la URL suministrada inicialmente y bloquea los hosts privados/internos directos, no vuelve a validar el destino final despu\u00e9s de las redirecciones HTTP. Como resultado, un atacante puede suministrar una URL HTTPS p\u00fablica que pasa la validaci\u00f3n y luego redirige la solicitud del lado del servidor a un recurso interno."
    }
  ],
  "id": "CVE-2026-40168",
  "lastModified": "2026-10-26T21:10:00.170",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-40168",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-13T20:55:02.053732Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-10T20:16:22.643",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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