Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-34078— Flatpak has a complete sandbox escape leading to host file access and code execution in the host context

Quick assessment

Affected
flatpak flatpak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flatpak是Flatpak开源的一个用于在Linux上构建、分发和运行沙盒桌面应用程序的系统。 Flatpak 1.16.4之前版本存在安全漏洞，该漏洞源于sandbox-expose选项接受应用控制的符号链接，可能导致访问所有主机文件并在主机环境中执行代码。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.90% · P58

Affected Version Matrix 1

VendorProduct Version RangeStatus
flatpak flatpak < 1.16.4 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-34078

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Flatpak has a complete sandbox escape leading to host file access and code execution in the host context
Source: CVE Program / CVE List V5
Vulnerability Description
Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-61
Source: CVE Program / CVE List V5
Vulnerability Title
Flatpak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flatpak是Flatpak开源的一个用于在Linux上构建、分发和运行沙盒桌面应用程序的系统。 Flatpak 1.16.4之前版本存在安全漏洞，该漏洞源于sandbox-expose选项接受应用控制的符号链接，可能导致访问所有主机文件并在主机环境中执行代码。
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
flatpak flatpak < 1.16.4 -

II. Public POCs for CVE-2026-34078

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-34078

请登录查看更多情报信息。

Same Patch Batch · flatpak · 2026-04-07 · 3 CVEs total

CVE-2026-34079 Flatpak affected by arbitrary file deletion on the host filesystem
CVE-2026-34080 xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception

IV. Related Vulnerabilities

Same product: flatpak
Same vendor: flatpak
Same weakness: CWE-61

V. Comments for CVE-2026-34078

No comments yet

Leave a comment