Application hang via zero-size box offset loop
Published Jun 9, 2026 · Updated Jun 9, 2026
Denial of service in image-size 1.1.0 through 1.2.0 and 2.0.0 through 2.0.1 allows remote attackers to hang Node.js applications. The findBox helper accepts a parsed JXL, HEIF, or JP2 box size of zero and adds it to the current offset, so the validation loop never advances. Exploitation requires an application to process an attacker-supplied image buffer; the affected Node.js event loop then remains blocked.
Summary
What happened
Denial of service in image-size 1.1.0 through 1.2.0 and 2.0.0 through 2.0.1 allows remote attackers to hang Node.js applications. The findBox helper accepts a parsed JXL, HEIF, or JP2 box size of zero and adds it to the current offset, so the validation loop never advances. Exploitation requires an application to process an attacker-supplied image buffer; the affected Node.js event loop then remains blocked.
The record
- CVE
- CVE-2025-71319
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- image-size
- Product
- image-size
- Classifications
- CWE-835, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.0 <1.2.1
- Affected versionversion=2.0.0 <2.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Crafted HEIF zero-size box proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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