CVE-2026-106116
Medium
Description
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductSixlabors Imagesharp
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-835CWE-835
How to fix
Update
- sixlabors imagesharp3.2.0, 4.1.2 or later
- SixLabors.ImageSharp3.2.0, 4.1.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sixlabors imagesharp | 2.0.0 ≤ v < 3.2.0, 4.0.0 ≤ v < 4.1.2 | 3.2.0, 4.1.2 |
| SixLabors.ImageSharpNuGet | 2.0.0 ≤ v < 3.2.0, 4.0.0 ≤ v < 4.1.2 | 3.2.0, 4.1.2 |
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