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CVE-2026-97026— Flatpak: flatpak: world-writable temporary child repositories in system-helper cache path

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.

Flatpak 在用户缓存目录下创建具有世界可写权限（权限模式 0777）的临时子仓库目录。在具有宽松 umask 设置的多用户系统上，其他本地用户可能能够读取或修改在安装应用程序或运行时期间使用的临时目录，从而可能导致安装失败（拒绝服务）；尽管经过篡改的内容会在签名/摘要验证阶段失败，不会被系统信任。

CVSS 3.9 · Low

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-97026

Vulnerability Information
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Vulnerability Title
Flatpak: flatpak: world-writable temporary child repositories in system-helper cache path
Source: CVE Program / CVE List V5
Vulnerability Description
Flatpak creates temporary child repository directories under the user cache with world-writable permissions (0777). On multi-user systems with a permissive umask, other local users could read or modify the temporary directory used while installing apps or runtimes, potentially causing installation failures (denial of service); tampered content would fail signature/digest verification rather than being trusted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
创建拥有不安全权限的临时文件
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-2026-97026

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III. Intelligence Information for CVE-2026-97026

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Other References for CVE-2026-97026 (3)

Same Patch Batch · Red Hat · 2026-09-28 · 10 CVEs total

CVE-2026-101292 8.2 HIGH Artemis-core-client: unsafe reflection in apache activemq artemis federation message deser
CVE-2026-86330 7.2 HIGH Noobaa-core: noobaa-core: os command injection in cluster_internal_api.set_hostname_intern
CVE-2026-97023 7.1 HIGH Flatpak: flatpak: arbitrary file deletion in root context via path traversal in deploy dir
CVE-2026-87114 7.1 HIGH Kube-compare: container:// reference extraction runs the image entrypoint and silently esc
CVE-2026-102010 7.0 HIGH Gcc-toolset-15-gcc: gcc: gcc-toolset-16: gcc: denial of service via use-after-free in bina
CVE-2026-96740 6.5 MEDIUM Streamshub/console: console-operator: streams for apache kafka console: unfiltered kafka c
CVE-2026-101333 3.7 LOW Keycloak-services: keycloak-services: unbounded metric series creation via idp tag on brok
CVE-2026-97027 3.6 LOW Flatpak: flatpak: denial of service via unsanitized keys in exported desktop entry / d-bus
CVE-2026-97025 3.2 LOW Flatpak: flatpak: world-readable oci authentication token in system-helper cache path

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-378

V. Comments for CVE-2026-97026

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