Denial of Service Vulnerability in Image-Size Product by Vendor Joshua Hu
CVE-2025-71319

8.7HIGH

Key Information:

Vendor

Image-size

Status
Image-size
Vendor
CVE Published:
9 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-71319?

The image-size library, up to version 2.0.2, includes a vulnerability that can lead to a denial of service condition. By supplying a specially crafted image buffer with a zero-valued size field in a recognized box-type, an attacker can trigger an infinite loop within the Node.js event loop. This can occur in the JXL or HEIF image parsers, as the crafted image leads to an offset that does not advance, effectively causing the application to hang indefinitely.

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.

CVE-2025-71319 - Proof of Concept

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

Alessio Della Libera (@dellalibera)
.