SB2026070288 - Multiple vulnerabilities in WinRAR

Description

This security bulletin contains information about 2 vulnerabilities.

1) Link following (CVE-ID: N/A)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to place a symbolic link outside the destination folder.

The vulnerability exists due to improper link resolution in the extraction code when extracting a specially crafted RAR archive. A remote attacker can supply a specially crafted archive to place a symbolic link outside the destination folder.

The potential threat is limited to cases where another tool uses the created symbolic link to store files.

2) Heap-based buffer overflow (CVE-ID: CVE-2026-14191)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in the RAR5 recovery volume data reconstruction code when processing a specially crafted archive. A remote attacker can supply a specially crafted archive to execute arbitrary code.

Remediation

Install update from vendor's website.

References

• https://www.rarlab.com/rarnew.htm#7.23
• https://github.com/advisories/GHSA-5hjj-fvq6-8j36