Pillow: Heap buffer overflow in ImagingJpegDecode

影響: pip:Pillow <= 12.3.0 → 13.0.0

JpegImageFile.draft() — which Image.thumbnail() calls automatically — requests 1/2, 1/4 or 1/8 scaled JPEG output and shrinks self._size and the tile extents to match, so _setimage() allocates a single-row decode buffer of ceil(W/s) samples. ImagingJpegDecode() sets cinfo.scale_num/scale_denom, calls jpeg_start_decompress(), and then reads scanlines into that buffer without ever comparing cinfo.output_width, cinfo.output_height or cinfo.out_color_components against state->xsize, state->…

在 GitHub Advisory Database 阅读

2026/10/21 05:40，GitHub Advisory Database 发布了“Pillow: Heap buffer overflow in ImagingJpegDecode”（类型：漏洞公告）。严重程度为“严重”（critical）。相关技术：Python。CVE：CVE-2026-112403。