CVE-2026-96276
Flatpak: flatpak: arbitrary write in host context via flatpak build-init
CVSS Score
6.5
EPSS Score
0.4%
EPSS Percentile
38th
If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak build-init --writable-sdk --sdk-extension` with that SDK, attacker-chosen files could be written outside the working directory, since the target path is resolved via a function that allows `..` traversal.
| CWE | CWE-22 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Sep 23, 2026 |
| Last Updated | Nov 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
Credits
Upstream acknowledges Sebastian Wick as the original reporter.