Ghostscript heap overflow enables RCE via crafted PDF uploads

Wed, 14 Oct 2026 15:48:57 +0000

Engineer — Act: A public PoC on GitHub makes exploitation of this critical heap buffer overflow practical; audit any server-side document or image-processing pipelines that invoke Ghostscript, and patch to the fixed version immediately or restrict PDF upload endpoints until patching is complete.
SOC/IR — Plan: No active exploitation reported yet, but the public PoC shortens the window; build detections for anomalous Ghostscript process behavior — unexpected child process spawning or outbound network calls from Ghostscript — and baseline normal document-processing activity now.
Leader — Skip
Signals: CVE-2026-39919 — CISA KEV: not listed, EPSS 0.01, public PoC on GitHub

Pdf-Upload on CuraSec