CVE-2025-71329
image-size 2.0.2 Denial of Service via Infinite Loop in JXL/HEIF Parser
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 8.7EPSS 0.4%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
10 Jun 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
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
Affected products
image-size · image-sizepublic PoCs found — 1
cve_referencejoshua.hu/image-size-infinite-loop-dos-vulnerabilitiesunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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