CVE-2026-45820
NONE—CVSS v3
—CVSS v2
0.26%
EPSS (exploit probability)
CWE-400CWE
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.
Affected routers (0)
No routers currently mapped to this CVE in our database.