CVE-2026-97027

low

Assigned by CNA: redhat

Published 2026-09-28 · Modified 2026-09-28

Discuss on Community Propose mitigation

CVSS v3

3.6

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

3.6

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.

Predictions

Exploit likelihood

36%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Debian Mixed 4 releases

Version	Status	Fixed in
trixie	Fixed	`1.16.6-1~deb13u3`
sid	Fixed	`1.18.4-1`
forky	Affected	—
bookworm	Affected	—

References

CWEs

CWE-20

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.