What’s Vulnerable › Vulnerabilities

CVE-2026-97027: Flatpak: flatpak: denial of service via unsanitized keys in exported desktop entry / d-bus service files

• Severity: low (CVSS 3.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-28 · updated 2026-09-29
• Weakness: CWE-20

Description

Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-97027
• https://bugzilla.redhat.com/show_bug.cgi?id=2542683
• https://github.com/flatpak/flatpak/security/advisories/GHSA-v64f-hrwr-j4vh

Get alerted when CVE-2026-97027 or the next vulnerability affects your stack