CVE-2026-106116
ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-835 |
| Vendor | sixlabors |
| Product | imagesharp |
| Published | Oct 6, 2026 |
| Last Updated | Oct 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
SixLabors / ImageSharp
>= 2.0.0, < 4.1.2
References
github.com: https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g github.com: https://github.com/SixLabors/ImageSharp/pull/3187 github.com: https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ec github.com: https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2