Denial of Service Vulnerability in image-size by Node.js
CVE-2025-71329

8.7HIGH

Key Information:

Vendor

Image-size

Status
Image-size
Vendor
CVE Published:
10 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-71329?

The image-size library through version 2.0.2 contains a vulnerability that allows a remote attacker to induce a denial of service by sending a specially crafted image buffer with a zero-valued size field. This input can manipulate the Node.js event loop, resulting in an infinite loop during the image parsing process for JXL or HEIF formats. Consequently, the application becomes unresponsive, with the offset failing to progress and inevitably hanging until manually terminated.

Affected Version(s)

image-size 1.1.0 <= 1.2.1

image-size 2.0.0 <= 2.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

image-size-next
Created by lcf2212dev

References

https://joshua.hu/image-size-infinite-loop-dos-vulnerabil...
technical-descriptionexploit
https://web.archive.org/web/20260224152152/https://github...
issue-tracking
https://www.vulncheck.com/advisories/image-size-denial-of...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Joshua Rogers (@MegaManSec)
.