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CVE-2026-96282— Flatpak: flatpak: extension metadata path traversal file existence oracle

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

恶意 Flatpak 扩展可以探测主机文件系统，以确定任意路径下存在的文件和目录，并且可以通过使用该扩展的沙盒应用程序泄露主机目录列表。此外，未经验证的扩展元数据可能导致扩展内容被挂载到沙箱内非预期的位置。

CVSS 3.1 · Low
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I. Basic Information for CVE-2026-96282

Vulnerability Information
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Vulnerability Title
Flatpak: flatpak: extension metadata path traversal file existence oracle
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-96282

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III. Intelligence Information for CVE-2026-96282

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Other References for CVE-2026-96282 (3)

Same Patch Batch · Red Hat · 2026-09-27 · 6 CVEs total

CVE-2026-96280 7.5 HIGH Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems
CVE-2026-96279 6.5 MEDIUM Flatpak: flatpak: path traversal issue in oci archive extraction via hardlinks
CVE-2026-96281 6.2 MEDIUM Flatpak: flatpak: unprivileged active user can bypass anti-downgrade checks for system app
CVE-2026-96283 3.3 LOW Flatpak: flatpak: flatpak-system-helper cross-user cancelpull orphans another user's ongoi
CVE-2026-96284 2.5 LOW Flatpak: flatpak: arbitrary read-access to files in the system-helper context via oci syml

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-59

V. Comments for CVE-2026-96282

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