CVE Catalog

CVE-2026-55567

HighCVSS 7.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.14%

2th percentile - higher than 2% of all known CVEs

Summary

In BleachBit prior to 6.0.1, privileged Windows cleaning does not lock and validate a target's parent directory before deletion. A local unprivileged user can replace that directory with a Windows junction and use a native symlink to redirect the elevated deletion to an attacker-selected file. The arbitrary privileged file deletion can be combined with Windows Installer behavior to obtain local SYSTEM privileges.

Risk Assessment

The vulnerability allows a local unprivileged user to delete an arbitrary file with elevated privileges, and combined with Windows Installer to obtain SYSTEM privileges. This poses a serious privilege escalation risk.

Recommendation

Upgrade BleachBit to version 6.0.1 or later. Until patched, avoid running privileged cleaning on systems where untrusted local users operate.

Related vulnerabilities

Original NVD description (English source)

BleachBit cleans files to free disk space and to maintain privacy. Prior to 6.0.1, privileged Windows cleaning does not lock and validate a target's parent directory before deletion. A local unprivileged user can replace that directory with a Windows junction and use a native symlink to redirect the elevated deletion to an attacker-selected file. The arbitrary privileged file deletion can be combined with Windows Installer behavior to obtain local SYSTEM privileges. This issue is fixed in version 6.0.1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS