CVE•Published 2026-07-22•Modified 2026-07-23•0 articles on news•4 live references•NVD data
CVE-2026-45820
Vulnerability data via NVD (ingested)
CVSS v3.1
—
EPSS percentile
17
Exploit Prediction Scoring System · top 83% of all CVEs
Weaknesses (CWE)
Description
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.
Timeline
Published 2026-07-22
Modified 2026-07-23
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-45820Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-45820Censys host search filtered to this CVE id.
grep.app
CVE-2026-45820Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-45820GitHub code search for direct mentions.
Google dork
"CVE-2026-45820" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-45820 on GitHub.
We haven't classified any articles referencing CVE-2026-45820 yet. The external references above still apply.