BleachBit: Exploit File Delete to Escalate Privilege

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55567
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-21 15:17:29 UTC
Updated2026-09-24 21:16:28 UTC
DescriptionBleachBit 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001350000 probability, percentile 0.024370000 (date 2026-09-25)

Problem Types: CWE-367 | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Bleachbit Bleachbit affected < 6.0.1 Not specified

References

ReferenceSourceLinkTags
github.com/bleachbit/bleachbit/security/advisories/GHSA-vcjw-px28-5w94 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/bleachbit/bleachbit/commit/ee128238e92c7192f0c4d6406b1bd0cd91... [email protected] github.com
github.com/bleachbit/bleachbit/pull/1774 [email protected] github.com
github.com/bleachbit/bleachbit/releases/tag/v6.0.1 [email protected] github.com
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