CVE-2026-122146

HIGH 7.3

101arrowz fflate index.mjs unzipSync memory corruption

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

A weakness has been identified in 101arrowz fflate up to 0.8.3. This issue affects the function unzipSync of the file esm/index.mjs. This manipulation causes memory corruption. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-119
Vendor	101arrowz
Product	fflate
Published	Nov 5, 2026

Stay Ahead of the Next One

Get instant alerts for 101arrowz fflate

Be the first to know when new high vulnerabilities affecting 101arrowz fflate are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

101arrowz / fflate

0.8.0 0.8.1 0.8.2 0.8.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/431150 vuldb.com: https://vuldb.com/vuln/431150/cti vuldb.com: https://vuldb.com/cve/CVE-2026-122146 vuldb.com: https://vuldb.com/submit/1027352 github.com: https://github.com/ictrun/java/issues/9

Credits

🔍 ictrun (VulDB User) VulDB CNA Team