CVE-2025-71329

image-size 2.0.2 Denial of Service via Infinite Loop in JXL/HEIF Parser

HIGH
7.5
CVSS Score
Published: June 10, 2026 at 01:04 PM UTC
Updated: October 12, 2026 at 10:10 PM UTC
1 product affected across 1 vendorImage Size

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
PoC

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 image buffer with a zero-valued size field in a recognized box-type. Attackers can trigger an infinite loop in the JXL or HEIF image parsers by providing a crafted image containing a box with a size of zero, causing the offset to never advance and permanently hanging the application.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.1.0 ≤ v ≤ 1.2.12.0.0 ≤ v ≤ 2.0.21.1.02.0.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-835

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