Python Pillow - ValueError: Decompressed Data Too Large

This is to protect against a potential DoS attack on servers running Pillow caused by decompression bombs. It occurs when a decompressed image is found to have too large metadata. See http://pillow.readthedocs.io/en/4.0.x/handbook/image-file-formats.html?highlight=decompression#png

Here's the CVE report: https:// www.cvedetails.com/cve/CVE-2014-9601/

From a recent issue:

If you set ImageFile.LOAD_TRUNCATED_IMAGES to true, it will suppress the error (but still not read the large metadata). Alternately, you can change set the values here: https://github.com/python-pillow/Pillow/ blob/master/PIL/PngImagePlugin.py#L74

https://github.com/python-pillow/Pillow/issues/2445