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fflate unzipSync can enter an infinite loop when parsing malformed ZIP64 archives

🗓️ 22 Jul 2026 09:32:13Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 13 Views

Infinite loop DoS in fflate through 0.8.2 via ZIP64 sentinel with missing extra field tag.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-45820
22 Jul 202606:57
–attackerkb
cgr
Chainguard
CVE-2026-45820 vulnerabilities
5 Sep 202620:58
–cgr
circl
Circl
CVE-2026-45820
24 Jul 202602:48
–circl
cve
CVE
CVE-2026-45820
22 Jul 202606:57
–cve
cvelist
Cvelist
CVE-2026-45820
22 Jul 202606:57
–cvelist
euvd
EUVD
EUVD-2026-47616
22 Jul 202606:57
–euvd
nvd
NVD
CVE-2026-45820
22 Jul 202608:16
–nvd
osv
OSV
CGA-232R-CXPX-6494
4 Sep 202603:04
–osv
osv
OSV
CGA-249R-HX9C-W7FV
4 Sep 202615:23
–osv
osv
OSV
CGA-289F-C22H-CGV7
4 Sep 202612:07
–osv
Rows per page
Vulners
Node
OR
101arrowzfflateRange0.8.0–0.8.3npm
101arrowzfflateRange0.7.0–0.7.5npm
101arrowzfflateRange0.6.0–0.6.11npm
101arrowzfflateRange0.5.0–0.5.4npm
101arrowzfflateRange0.4.5–0.4.9npm

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03 Sep 2026 14:58Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.5
CVSS 48.7
EPSS0.00488
SSVC
13