Detections
Analytics

Echo: fflate: security update to 0.4.9

high Tenable Cloud Security Plugin ID 463561

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-45820)

Solution

Update the fflate library and its related packages to version 0.4.9 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-45820

Plugin Details

Severity: High

ID: 463561

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.65

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-45820

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-45820