image-size through 2.0.2 contains a denial of service vulnerability that allows remote attackers to permanently block the Node.js event loop by supplying a specially crafted ICNS image buffer. Attackers can craft an ICNS buffer containing valid magic bytes and a zero-valued entry length field to trigger an infinite loop in the ICNS parser, as the offset is never incremented when the entry length field is 0, causing the while loop condition to remain true indefinitely.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Image-size
  • Image-size
Image Sizes Project
  • Image Sizes

Configuration 1 [-]

OR cpe:2.3:a:image-size:image-size:*:*:*:*:*:*:*:*
cpe:2.3:a:image-size:image-size:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://joshua.hu/image-size-infinite-loop-dos-vulnerabilities cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-71330 cve-icon
https://web.archive.org/web/20260224152152/https://github.com/image-size/image-size/pull/439 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-71330 cve-icon
https://www.vulncheck.com/advisories/image-size-denial-of-service-via-malformed-icns-image-parsing cve-icon cve-icon cve-icon
History

Tue, 16 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 15 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Image-size
Image-size image-size
CPEs cpe:2.3:a:image-size:image-size:*:*:*:*:*:*:*:*
Vendors & Products Image-size
Image-size image-size

Thu, 11 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Image Sizes Project
Image Sizes Project image Sizes
Vendors & Products Image Sizes Project
Image Sizes Project image Sizes

Wed, 10 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 10 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Description image-size through 2.0.2 contains a denial of service vulnerability that allows remote attackers to permanently block the Node.js event loop by supplying a specially crafted ICNS image buffer. Attackers can craft an ICNS buffer containing valid magic bytes and a zero-valued entry length field to trigger an infinite loop in the ICNS parser, as the offset is never incremented when the entry length field is 0, causing the while loop condition to remain true indefinitely.
Title image-size 2.0.2 Denial of Service via Malformed ICNS Image Parsing
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-06-10T13:02:04.764Z

Updated: 2026-06-10T14:05:08.872Z

Reserved: 2026-06-10T12:57:20.193Z

Link: CVE-2025-71330

cve-icon Vulnrichment

Updated: 2026-06-10T14:04:56.180Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-10T14:16:30.387

Modified: 2026-06-15T17:00:32.203

Link: CVE-2025-71330

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-10T13:02:04Z

Links: CVE-2025-71330 - Bugzilla