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fflate vulnerabilities

Vulnerabilities published for fflate in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerability: 1

  1. CVE-2026-45820

    Medium · CVSS 6.6EPSS 0.28%Fix available

    CVE-2026-45820

    fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

    fflate fflate fflate fflate fflateNode.js
    • Update to 0.4.9
    • Update to 0.5.4
    • Update to 0.6.11
    • Update to 0.7.5
    • Update to 0.8.3
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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