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CVE

CVE-2026-34078

flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options (important)
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CVE

CVE-2026-34078

flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options (important)

DOCUMENTATION: A flaw was found in Flatpak, a Linux application sandboxing and distribution framework. A malicious application could exploit this by using specially crafted symlinks within the sandbox-expose options of the Flatpak portal. This allows the application to access arbitrary host files and potentially achieve code execution on the host system, bypassing the intended security sandbox. 

            STATEMENT: This Important flaw in Flatpak allows a malicious Flatpak application to escape its sandbox and achieve arbitrary code execution on the host system. By exploiting specially crafted symlinks within the sandbox-expose options, the integrity of the Flatpak sandboxing mechanism, a critical security feature in Red Hat environments, is compromised.

            MITIGATION: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
-
C
H
U
-

Related Resources

No items found.

References

https://access.redhat.com/security/cve/CVE-2026-34078

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.0005%
EPSS Percentile
0.15991%
Introduced Version
0
Fix Available
0:1.12.9-4.el8_10,0:1.12.9-4.el9_8.1,1.14.10-1~deb12u2,1.16.6-1~deb13u1,1.16.4-r0,0:1.16.6-1.amzn2023,0:1.0.9-10.amzn2.0.7,0:1.0.0-10.amzn2.0.7

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