---
id: CVE-2026-106116
title: ImageSharp is a 2D graphics library
summary: >-
  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 …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-835
vendor: SixLabors
product: ImageSharp
affected:
  - 'ImageSharp >= 2.0.0, < 4.1.2'
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:03:40.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106116'
references:
  - url: >-
      https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ec
    label: security-advisories@github.com
  - url: 'https://github.com/SixLabors/ImageSharp/pull/3187'
    label: security-advisories@github.com
  - url: 'https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g
    label: security-advisories@github.com
  - url: >-
      https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-06T18:21:43.778832Z'
ingestedAt: '2026-10-06T18:11:36.226Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.