Vulnerability · NVD

CVE-2026-48092

CVE-2026-48092, medium severity (CVSS 4.3): 1 tracked app concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 4.3
Exploitation: 0.5 %
Tracked apps: 1
Still exposed: 0

Published on 2026-06-05

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only on 32-bit builds of 7-Zip where size_t is 32 bits, allowing the addition offsetInBlock + blockSize to wrap modulo 2³². On 64-bit builds the addition is promoted to 64 bits and the check correctly rejects the input. Version 26.01 patches the issue.

Attack vector : Network No privileges required

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS 0.50% exploit very unlikely percentile 39.9%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

7-Zip Windows winget:7zip.7zip

Affected ≥9.34 <26.01 Fixed in 26.01 Latest tracked 26.03 patched

Observed affected builds (19)

26.00 25.01 25.00 24.09 24.08 24.07 24.06 24.05 23.01 22.01 22.00 21.07 21.06 19.00 19.00.00.0 18.06 18.05 18.01 16.04

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
7-zip	7-zip All platforms (wildcard)	All platforms (wildcard)	≥9.34 <26.01	cpe:2.3:a:7-zip:7-zip::::::::

View on NVD ↗ Advisory · securitylab.github.com

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