---
id: CVE-2026-8814
title: >-
  Versions of the package exifreader before 4.39.0 are vulnerable to Improper
  Handling of Highly Compressed Data (Data Amplification) due to decompressing
  PNG zTXt metadata without enforcing a built-in maximum decompressed output
  size
summary: >-
  Versions of the package exifreader before 4.39.0 are vulnerable to Improper
  Handling of Highly Compressed Data (Data Amplification) due to decompressing
  PNG zTXt metadata without enforcing a built-in maximum decompressed output
  size. Whe…
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-409
  - CWE-409
published: '2026-05-19'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-8814'
references:
  - url: 'https://gist.github.com/yuki-matsuhashi/cad1a45d936062438b4ab24613c34c55'
    label: report@snyk.io
  - url: >-
      https://github.com/mattiasw/ExifReader/commit/5f116128adc19f674902f8bf582bfe7dd0a36375
    label: report@snyk.io
  - url: 'https://security.snyk.io/vuln/SNYK-JS-EXIFREADER-16689340'
    label: report@snyk.io
  - url: 'https://security.snyk.io/vuln/SNYK-JS-EXIFREADER-16689340'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00507
epssPercentile: 0.40629
ingestedAt: '2026-07-23T20:19:18.764Z'
---

## Overview

Versions of the package exifreader before 4.39.0 are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) due to decompressing PNG zTXt metadata without enforcing a built-in maximum decompressed output size. When asynchronous parsing is enabled, a crafted PNG file containing a highly compressed zTXt chunk can cause ExifReader to materialize a disproportionately large Comment value in memory.

## Remediation

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