Vulnerability Intelligence Report
Flatpak: flatpak: arbitrary write in host context via flatpak build-init
CVE-2026-96276
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.
Path Traversal
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | all |
| Red Hat | Red Hat Enterprise Linux 7 | all |
| Red Hat | Red Hat Enterprise Linux 8 | all |
| Red Hat | Red Hat Enterprise Linux 9 | all |
Threat Intelligence Signals
Vulnerability Class
Path Traversal
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Red Hat, Inc. · Vendor · USA |
| Reserved | 2026-09-22T20:42:35 |
| Published | 2026-09-23T15:01:49 |
| Patch Date | 2026-08-11 |
| Last Updated | 2026-09-23T15:28:23 |
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