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Vulnerabilities CVE-2026-4424

CVE-2026-4424

High
Open
TLP:CLEAR

Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing

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Description

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

Details

CVSS Score
7.5
EPSS Score
0.88%

56.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Confidence
90%
Published
Mar 19, 2026
Last Modified
Aug 24, 2026
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