Denial Of Service (DoS)

SixLabors.ImageSharp is vulnerable to Denial Of Service DoS. The vulnerability is due to improper handling of malformed GIF comment extension blocks due to a missing block terminator, causing the GIF decoder to enter an infinite loop when processing specially crafted files...

CVE-2025-54575

CVE-2025-54575 affects SixLabors.ImageSharp (GIF decoding path). Versions before 2.1.11 and 3.0.0–3.1.10 are vulnerable to an infinite loop when processing specially crafted GIF files with a malformed comment extension block and missing terminator, leading to DoS. A fix is available in ImageSharp...

SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

Impact A specially crafted GIF file containing a malformed comment extension block with a missing block terminator can cause the ImageSharp GIF decoder to enter an infinite loop while attempting to skip the block. This leads to a denial of service. Applications processing untrusted GIF input shou...