CVE-2026-34590

{"id": "CVE-2026-34590", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34590", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-03T15:49:11.229869Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "gitroomhq", "product": "postiz-app", "versions": [{"status": "affected", "version": "< 2.21.4"}]}]}], "published": "2026-04-02T18:16:30.670", "references": [{"url": "https://github.com/gitroomhq/postiz-app/commit/5ae4c950db6aa516a31454b7a45b9480bca40a11", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.4", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-wc9c-7cv8-m225", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Postiz is an AI social media scheduling tool. Prior to version 2.21.4, the POST /webhooks/ endpoint for creating webhooks uses WebhooksDto which validates the url field with only @IsUrl() (format check), missing the @IsSafeWebhookUrl validator that blocks internal/private network addresses. The update (PUT /webhooks/) and test (POST /webhooks/send) endpoints correctly apply @IsSafeWebhookUrl. When a post is published, the orchestrator fetches the stored webhook URL without runtime validation, enabling blind SSRF against internal services. This issue has been patched in version 2.21.4."}, {"lang": "es", "value": "Postiz es una herramienta de programaci\u00f3n de redes sociales con IA. Antes de la versi\u00f3n 2.21.4, el endpoint POST /webhooks/ para crear webhooks utiliza WebhooksDto, que valida el campo 'url' solo con @IsUrl() (verificaci\u00f3n de formato), faltando el validador @IsSafeWebhookUrl que bloquea direcciones de red internas/privadas. Los endpoints de actualizaci\u00f3n (PUT /webhooks/) y prueba (POST /webhooks/send) aplican correctamente @IsSafeWebhookUrl. Cuando se publica una publicaci\u00f3n, el orquestador recupera la URL del webhook almacenada sin validaci\u00f3n en tiempo de ejecuci\u00f3n, lo que permite SSRF ciego contra servicios internos. Este problema ha sido parcheado en la versi\u00f3n 2.21.4."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C48A1C3-2954-480E-989E-4CE68EADAF4B", "versionEndExcluding": "2.21.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}