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CVE-2026-96275— Flatpak: flatpak: arbitrary write access as root via extra-data extraction

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.

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: is resolved via path operations that

CVSS 8.8 · High
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I. Basic Information for CVE-2026-96275

Vulnerability Information

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Vulnerability Title
Flatpak: flatpak: arbitrary write access as root via extra-data extraction
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
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-2026-96275

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III. Intelligence Information for CVE-2026-96275

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Other References for CVE-2026-96275 (3)

Same Patch Batch · Red Hat · 2026-09-23 · 8 CVEs total

CVE-2026-96512 7.8 HIGH Sudo: sudo: tz environment variable allows bypass of notbefore/notafter time-based authori
CVE-2026-96442 7.8 HIGH Emacs: emacs: arbitrary code execution, incomplete fix for cve-2024-53920
CVE-2026-88830 7.5 HIGH Busybox: busybox: tls montgomery reduction allocates bytes instead of digits, causing a pr
CVE-2026-88832 7.3 HIGH Busybox: busybox: romfs volume id parsing performs unbounded memcpy into fixed-size label
CVE-2026-96445 6.8 MEDIUM Keycloak-services: keycloak-services: conditional otp skip-header policy evaluated against
CVE-2026-96446 4.2 MEDIUM Keycloak-services: keycloak-services: par single-use bypass via prompt=none silent authent
CVE-2026-96276 Flatpak: flatpak: arbitrary write in host context via flatpak build-init

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-22

V. Comments for CVE-2026-96275

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