CVE-2026-106116 — ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop
ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer t…
Published: 2026-10-06 · CVSS: 5.3 · CVSS 3.1
ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a small malformed BigTIFF can keep one decoder thread executing for an attacker-controlled duration. This report does not claim worker-pool exhaustion. This issue is fixed in version 4.1.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7