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CVE-2026-41045— Weak polkit authentication check in qSnapper

Quick assessment

Affected
presire qSnapper
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

presire qSnapper是presire个人开发者开源的一个基于 Qt6/QML 开发的 Linux 图形界面应用，用于通过 D-Bus 和 PolicyKit 安全地管理 Btrfs/Snapper 文件系统快照。 presire qSnapper 1.3.3之前版本存在竞争条件问题漏洞，该漏洞源于polkit身份验证中存在时间检查时间使用问题，可能导致本地攻击者绕过qSnapper的身份验证机制并以root用户身份操作。

CVSS 8.1 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1548.002 · Bypass User Account Control

Affected Version Matrix 1

VendorProduct Version RangeStatus
presire qSnapper < 1.3.3 affected
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I. Basic Information for CVE-2026-41045

Vulnerability Information
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Vulnerability Title
Weak polkit authentication check in qSnapper
Source: CVE Program / CVE List V5
Vulnerability Description
A time-to-check-time-of-use in polkit authentication of qSnapper before version 1.3.3 allowed a local attacker to bypass qSnappers authentication mechanism and operate e.g. as root user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
presire qSnapper 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
presire qSnapper是presire个人开发者开源的一个基于 Qt6/QML 开发的 Linux 图形界面应用，用于通过 D-Bus 和 PolicyKit 安全地管理 Btrfs/Snapper 文件系统快照。 presire qSnapper 1.3.3之前版本存在竞争条件问题漏洞，该漏洞源于polkit身份验证中存在时间检查时间使用问题，可能导致本地攻击者绕过qSnapper的身份验证机制并以root用户身份操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
presire qSnapper 0 ~ 1.3.3 -

II. Public POCs for CVE-2026-41045

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9149 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-41045

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Vendor Advisories for CVE-2026-41045 (2)

Proof of Concept for CVE-2026-41045 (1)

Same Patch Batch · presire · 2026-06-22 · 5 CVEs total

CVE-2026-41046 7.3 HIGH path traversal via `config` parameter in qSnapper
CVE-2026-41049 Caching of Authentication allows Authentication Bypass between users in qSnapper
CVE-2026-41047 Information leak via “diff” methods in qSnapper
CVE-2026-41048 Caching of Authentication allows Authentication Bypass in qSnapper

IV. Related Vulnerabilities

Same product: qSnapper
Same vendor: presire
Same weakness: CWE-367