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CVE-2026-122146101arrowz fflate index.mjs unzipSync memory corruption
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.
6.9 MEDIUMEPSS 0.29%Not in KEVNVD: Deferred
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.9 | MEDIUM | 4.0VulDB (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| 5.5 | MEDIUM | 4.0VulDB (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| 7.3 | HIGH | 3.1VulDB (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| 7.3 | HIGH | 3.1VulDB (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RC:C |
| 7.3 | HIGH | 3.0VulDB (CNA) | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RC:C |
| 7.5 | HIGH | 2.0VulDB (CNA) | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| 7.5 | HIGH | 2.0VulDB (CNA) | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C |
Details
- CVE ID
- CVE-2026-122146
- Status
- Deferred
- Assigner (CNA)
- VulDB
- Published
- Nov 5, 2026
- Last modified
- 2026-11-05 21:18 UTC
- Weaknesses
- CWE-119 · Memory Corruption
Affected Products
As published by the CNA in the CVE record.
101arrowzfflate4 version ranges
- 0.8.0
- 0.8.1
- 0.8.2
- 0.8.3