CVE-2026-106116
ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop
MEDIUM 5.3EPSS 0.4%
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.
- Affected
- SixLabors · ImageSharp
- CVSS v3.1 GITHUB
- 5.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS
- 0.37% chance of exploitation in the next 30 days, 29th percentile
- Published
- 2026-10-06