PYSEC-2026-1747 OpenEXR Heap-Based Buffer Overflow in Deep Scanline Parsing via Forged Unpacked Size

Summary The OpenEXRCore code is vulnerable to a heap-based buffer overflow during a write operation when decompressing ZIPS-packed deep scan-line EXR files with a maliciously forged chunk header. Details When parsing STORAGEDEEPSCANLINE chunks from an EXR file, the following code from...