CVE-2026-34590: fallo de gravedad media en gitroomhq postiz-app
Postiz: SSRF via Webhook Creation Endpoint Missing URL Safety Validation
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 5.4epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Productos afectados
gitroomhq · postiz-appCVEs relacionadas — gitroomhq postiz-app
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-19264CRITICALUnauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeoverEPSS 1.0%CVE-2026-42298CRITICALPostiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.devEPSS 0.5%CVE-2026-34577HIGHPostiz: Unauthenticated Full-Read SSRF via /public/stream Endpoint with Trivially Bypassable Extension CheckEPSS 0.5%CVE-2026-40168HIGHPostiz has Server-Side Request Forgery via Redirect Bypass in /api/public/streamEPSS 0.4%CVE-2025-53641HIGHPostiz allows header mutation in middleware facilitates resulting in SSRFEPSS 0.3%CVE-2026-34576HIGHPostiz: SSRF in upload-from-url endpoint allows fetching internal resources and cloud metadataEPSS 0.3%