CVE-2026-48092

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/	Exploit Patch Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/	Exploit Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-05 15:16

Updated : 2026-06-17 10:54

NVD link : CVE-2026-48092

Mitre link : CVE-2026-48092

CVE.ORG link : CVE-2026-48092

JSON object : View

Products Affected

7-zip

7-zip

CWE

CWE-125

Out-of-bounds Read

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