Detections
Analytics

7-Zip >= 9.18 < 26.01 SquashFS BlockToNode OOB Read (GHSL-2026-115_GHSL-2026-122)

medium Nessus Plugin ID 318789

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Synopsis

The remote host has an application installed that is affected by multiple vulnerabilities.

Description

The version of 7-Zip installed on the remote Windows host is >= 9.18 and prior to 26.01. It is, therefore, affected by multiple vulnerabilities:

 - An out-of-bounds read exists in 7-Zip's SquashFS BlockToNode handling due to an uninitialized heap read, which can lead to a crash when processing a crafted SquashFS archive. (CVE-2026-48104)

 - A path traversal vulnerability exists in 7-Zip's extraction mode that can lead to arbitrary file write when extracting a crafted archive. (GHSL-2026-115)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to 7-Zip version 26.01 or later.

See Also

http://www.nessus.org/u?6f6968b6

Plugin Details

Severity: Medium

ID: 318789

File Name: 7zip_26_01_CVE-2026-48104.nasl

Version: 1.3

Type: Local

Agent: windows

Family: Windows

Published: 6/5/2026

Updated: 6/9/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.5

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

CVSS Score Source: CVE-2026-48104

CVSS v3

Risk Factor: Medium

Base Score: 4.2

Temporal Score: 3.8

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

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

Vulnerability Information

CPE: cpe:/a:7-zip:7-zip

Required KB Items: installed_sw/7-Zip

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/22/2026

Vulnerability Publication Date: 5/22/2026

Reference Information

CVE: CVE-2026-48104

IAVA: 2026-A-0525