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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-96276
https://bugzilla.redhat.com/show_bug.cgi?id=2539418
https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm

Configurations

No configuration.

History

27 Sep 2026, 20:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~9.8~~	v2 : unknown v3 : 6.5

23 Sep 2026, 16:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

23 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 15:17

Updated : 2026-09-27 21:17

NVD link : CVE-2026-96276

Mitre link : CVE-2026-96276

CVE.ORG link : CVE-2026-96276

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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