CVE-2026-48092
HIGH EPSS 24.1%
Published Jun 5, 20263w ago · Modified Jun 17, 20261w ago
8.1 CVSS 3.1
Published Jun 5, 2026 3w ago
Last Modified Jun 17, 2026 1w ago
Description
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
24.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| 7-zip | 7-zip | * | ≥9.34 – <26.01 |
References 1
- securitylab.github.com https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/
Remediation
- securitylab.github.com https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/